CN111240708A - Industrial control system host, industrial control system and method for upgrading industrial control system host software - Google Patents
Industrial control system host, industrial control system and method for upgrading industrial control system host software Download PDFInfo
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- CN111240708A CN111240708A CN201911353181.5A CN201911353181A CN111240708A CN 111240708 A CN111240708 A CN 111240708A CN 201911353181 A CN201911353181 A CN 201911353181A CN 111240708 A CN111240708 A CN 111240708A
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Abstract
The invention discloses an industrial control system host, an industrial control system and a method for upgrading industrial control system host software, wherein the method comprises the following steps: acquiring a work order task sent by a server, and adding the work order task to a temporary white list, wherein the work order task comprises a work order upgrade package, the starting time of the work order task, the ending time of the work order task and the requirement of the work order task; periodically judging whether the current time reaches the starting time of the work order task; if the current time reaches the starting time of the work order task, activating the work order task, and executing a preset work order safety strategy according to the work order task; acquiring the operation of a manager on a work order upgrading package in the activated work order task; judging whether the operation of the administrator on the work order upgrading packet meets the requirement of the work order task; and if the operation of the administrator on the work order upgrading packet meets the requirement of the work order task, the operation of the administrator on the work order upgrading packet is received, and the host software of the industrial control system is upgraded according to the operation and the work order upgrading packet.
Description
Technical Field
The invention relates to the technical field of industrial control system host safety, in particular to an industrial control system host, an industrial control system and an industrial control system host software upgrading method.
Background
In the network security practice of the industrial control system, the white list technology in the industrial control environment is introduced because the software and equipment updating frequency of the industrial control system is low, the process, communication and data are relatively single and stable, and the industrial control system has strict requirements on the reliability and continuity of the service. Despite their low software and equipment update frequency, industrial control systems do not avoid the need to upgrade or maintain them. For an industrial control field host, if a white list protection strategy or other file protection strategies are configured on the current host, files or directories for upgrading are limited by the white list protection strategy or the file protection strategy, or files identified as threatening the system are identified, so that the operation of upgrading files is limited, and the normal upgrading of software is influenced.
Disclosure of Invention
In view of this, embodiments of the present invention provide an industrial control system host, an industrial control system, and a method for upgrading industrial control system host software, so as to solve the problem that, for an industrial control field host, if a white list protection or other file protection policies are configured for a current host, files or directories used for upgrading are limited by the policies.
According to a first aspect, an embodiment of the present invention provides a method for upgrading industrial control system host software, which is applied to an industrial control system host, where the industrial control system host is connected to a server, and the method includes: acquiring a work order task sent by a server, and adding the work order task to a temporary white list, wherein the work order task comprises a work order upgrade package, the starting time of the work order task, the ending time of the work order task and the requirement of the work order task; periodically judging whether the current time reaches the starting time of the work order task; if the current time reaches the starting time of the work order task, activating the work order task, and executing a preset work order safety strategy according to the work order task; acquiring the operation of a manager on a work order upgrading package in the activated work order task; judging whether the operation of the administrator on the work order upgrading packet meets the requirement of the work order task; and if the operation of the administrator on the work order upgrading packet meets the requirement of the work order task, the operation of the administrator on the work order upgrading packet is received, and the host software of the industrial control system is upgraded according to the operation and the work order upgrading packet.
Optionally, if the current time does not reach the start time of the work order task, the work order task is not activated, and the current host security policy is executed.
Optionally, if the current time exceeds the end time of the work order task, deleting the work order task and executing the current host security policy.
Optionally, if the operation of the administrator on the work order upgrade package does not meet the requirement of the work order task, the operation of the administrator on the work order upgrade package is not accepted, and the current host security policy is executed.
Optionally, after obtaining the operation of the administrator on the work order upgrade package in the activated work order task, the method further includes: and sending the operation state of the work order upgrading packet of the administrator to the server.
Optionally, after the upgrading of the host software of the industrial control system is completed, the method further includes: and updating the local white list according to the upgraded industrial control system host software.
Optionally, after the upgrading of the host software of the industrial control system is completed, the method further includes: and sending the operation result of the work order upgrading packet by the administrator to the server.
According to a second aspect, an embodiment of the present invention provides an industrial control system host, including: at least one processor; and a memory communicatively coupled to the at least one processor; the memory stores instructions executable by the processor, and the instructions are executed by the at least one processor to cause the at least one processor to perform the method for upgrading the industrial control system host software according to the first aspect or any embodiment of the first aspect.
According to a third aspect, an embodiment of the present invention provides an industrial control system, including: a server and an industrial control system host as in the second aspect or any embodiment of the second aspect.
According to the industrial control system host, the industrial control system and the method for upgrading the software of the industrial control system host, provided by the embodiment of the invention, the work order task is added to the temporary white list, the work order task is executed after the starting time of the work order task is reached, a preset work order safety strategy is executed on the current work order task, a user is authorized to operate a work order upgrading package, the software is upgraded, and the software can be upgraded without the limitation of the white list protection or the file protection strategy of the current host, so that the software is upgraded; the preset work order safety strategy is only executed on the current work order task, and the operation of the administrator on the work order upgrading packet is monitored, so that the work order upgrading packet authorized to be operated by the administrator can be accurately controlled, the diffusion of the authority is prevented, and the safe and reliable operation of the host computer in the software upgrading process is ensured; moreover, for the industrial control system host which is distributed and deployed by the server, the server can simultaneously send the work order tasks to the industrial control system hosts, so that the work order tasks can be issued in batches, the consistency of the work order tasks received by the industrial control system hosts is ensured, the probability of misoperation of a manager can be greatly reduced, and the efficiency of upgrading the software of the industrial control system host is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flow chart illustrating a method for upgrading industrial control system host software according to an embodiment of the present invention;
FIG. 2 is a block diagram of a host structure of an industrial control system according to an embodiment of the present invention;
fig. 3 shows a schematic diagram of the interaction between the industrial control system host and the server according to the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a method for upgrading industrial control system host software, which is applied to an industrial control system host, wherein the industrial control system host is connected with a server. Specifically, the industrial control system comprises a server and industrial control system hosts, and the server is used for performing centralized management on all the industrial control system hosts. At the server side, an administrator may upload a work order upgrade package to the server, where the work order upgrade package includes files or directories for software upgrades. The server calculates the hash value of the work order by adopting an SHA256 algorithm, and simultaneously, files or directories in the work order upgrade package are added into a temporary white list of the server. The administrator creates a work order task template on the server, and the content comprises: the work order number, the work order task starting time, the work order task ending time and the associated work order upgrading package. According to the work order upgrade package, the administrator can also configure the requirements of the work order upgrade package, such as the operation subject, the object and the operation authority. Wherein the operation subject can be an authorized operation system administrator or an operation process on the industrial host system. The object can be a file or a directory on a host of the industrial control system, and the operation authority of the operation subject on the object can be set as five types of authority of 'complete control, newly adding, modifying content, renaming and deleting'. The new operation can modify the new files and directories, and the content modification operation cannot add the files. The requirements of the work order upgrading package, the work order task template and the work order upgrading package are combined to form a work order task.
At an industrial control system host, the industrial control system host receives a work order task sent by a server and upgrades software, and specifically, as shown in fig. 1, the method for upgrading the industrial control system host software of the embodiment of the present invention includes:
s101, acquiring a work order task sent by a server, and adding the work order task to a temporary white list, wherein in the embodiment of the invention, the work order task comprises a work order upgrading packet, the starting time of the work order task, the ending time of the work order task and the requirements of the work order task; specifically, the work order task may be one task or multiple tasks, and the server may send one work order task or multiple work order tasks at the same time. In this embodiment, a server sends a work order task, and the work order task includes a task as an example. The host computer guard is installed on the host computer of the industrial control system, the host computer guard is configured with a white list protection strategy, a file protection strategy, a self-protection strategy or an access control strategy, and after the host computer guard obtains the work order tasks sent by the server, the work order tasks need to be added to the temporary white list so as to prevent the work order tasks from being deleted when the work order tasks are identified as threatening files by the host computer of the industrial control system.
S102, periodically judging whether the current time reaches the starting time of the work order task; specifically, because the work order tasks all set the start time and the end time of the work order task, the work order task can be executed within the start time and the end time of the work order task, and therefore, the temporary white list on the local computer can be scanned at regular intervals (for example, 10 seconds), and whether the current time reaches the start time of the work order task or not can be checked. If the current time reaches the start time of the work order task, the process proceeds to step S103. If the current time does not reach the start time of the work order task, the process proceeds to step S107.
S103, activating the work order task, and executing a preset work order safety strategy according to the work order task; specifically, if the current time reaches the starting time of the work order task, the work order task is activated, the activation state of the work order task is sent to the host guard, and the preset work order safety strategy is executed on the work order task, so that an administrator can operate the work order upgrade package in the work order task. Other files continue to enforce the current host guard's security protection policy.
S104, acquiring the operation of the administrator on the work order upgrading packet in the activated work order task; specifically, the activated work order task executes a preset work order security policy, and after an administrator with login authority logs in the industrial control system host, the administrator can operate the files or directories in the work order upgrade package.
S105, judging whether the operation of the administrator on the work order upgrading packet meets the requirement of the work order task; specifically, the host guard judges whether the operation of the current administrator meets the requirement of the work order task, for example, the operation includes complete control, addition, content modification, deletion and renaming, and the host guard checks whether the subject and the object of the operation and the authority of the operation subject to the object are correct. And if the operation of the work order upgrading package by the administrator meets the requirement of the work order task, the step S106 is entered. If the operation of the work order upgrade package by the administrator does not meet the requirements of the work order task, the process proceeds to step S108.
And S106, receiving the operation of the administrator on the work order upgrading packet, and upgrading the host software of the industrial control system according to the operation and the work order upgrading packet.
And S107, not activating the work order task, and executing the current host security strategy.
And S108, not accepting the operation of the administrator on the work order upgrading packet, and executing the current host security strategy.
According to the method for upgrading the host software of the industrial control system, the work order task is added to the temporary white list, the work order task is executed after the starting time of the work order task is reached, the preset work order safety strategy is executed on the current work order task, a user is authorized to operate a work order upgrading package, the software is upgraded, and the software upgrading can be free from the limit of the white list protection or the file protection strategy of the current host, so that the software upgrading is carried out; the preset work order safety strategy is only executed on the current work order task, and the operation of the administrator on the work order upgrading packet is monitored, so that the work order upgrading packet authorized to be operated by the administrator can be accurately controlled, the diffusion of the authority is prevented, and the safe and reliable operation of the host computer in the software upgrading process is ensured; moreover, for the industrial control system host which is distributed and deployed by the server, the server can simultaneously send the work order tasks to the industrial control system hosts, so that the work order tasks can be issued in batches, the consistency of the work order tasks received by the industrial control system hosts is ensured, the probability of misoperation of a manager can be greatly reduced, and the efficiency of upgrading the software of the industrial control system host is improved.
In an optional embodiment, if the current time exceeds the end time of the work order task, the work order task is deleted, and the current host security policy is executed. Specifically, the host guard may prompt the server for the remaining work order task time every 30 seconds, starting 10 minutes before the end time of the work order task. And if the current time exceeds the end time of the work order task, the host guard deletes the work order task and continues to execute the security strategy of the current host.
In an optional embodiment, after obtaining the operation of the administrator on the work order upgrade package in the activated work order task, the method for upgrading the host software of the industrial control system according to the embodiment of the present invention further includes: and sending the operation state of the work order upgrading packet of the administrator to the server. Specifically, the operation states are divided into three types: success, mismatch of operation success files and insufficient failure authority. By sending the operation state of the work order upgrading packet to the server in real time, an administrator can check the state of the industrial control system host in the process of executing the work order task at the server side, and supervise the work order task.
In an optional embodiment, after completing the upgrading of the host software of the industrial control system, the method for upgrading the host software of the industrial control system according to the embodiment of the present invention further includes: and updating the local white list according to the upgraded industrial control system host software. Specifically, after the host software of the industrial control system is upgraded, the host software of the industrial control system changes and is not in the local white list, and after the work order task is deleted, the host software of the industrial control system is limited by the local white list and cannot run, and the upgraded host software of the industrial control system needs to be put into the local white list in time to update the local white list.
In an optional embodiment, after completing the upgrading of the host software of the industrial control system, the method for upgrading the host software of the industrial control system according to the embodiment of the present invention further includes: and sending the operation result of the work order upgrading packet by the administrator to the server. Specifically, when the work order task is finished, the host guard sends the success or failure information of the work order task operation to the server, and deletes the local work order task and data in time. By sending the operation result to the server, the administrator can check the result of the work order task execution at the server, and if the execution is unsuccessful, the work order task may need to be sent to the industrial control system host again.
An embodiment of the present invention further provides an industrial control system host, as shown in fig. 2, the industrial control system host may include a processor 21 and a memory 22, where the processor 21 and the memory 22 may be connected by a bus or in another manner, and fig. 2 takes the example of connection by a bus as an example.
The processor 21 may be a Central Processing Unit (CPU). The Processor 21 may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, or any combination thereof.
The memory 22, which is a non-transitory computer readable storage medium, may be used to store non-transitory software programs, non-transitory computer executable programs, and modules, such as program instructions/modules corresponding to the method for upgrading industrial control system host software in the embodiments of the present invention. The processor 21 executes various functional applications and data processing of the processor by executing the non-transitory software programs, instructions and modules stored in the memory 22, namely, the method for upgrading the host software of the industrial control system in the above method embodiment.
The memory 22 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created by the processor 21, and the like. Further, the memory 22 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory 22 may optionally include memory located remotely from the processor 21, and these remote memories may be connected to the processor 21 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The one or more modules are stored in the memory 22 and when executed by the processor 21, perform a method of industrial control system host software upgrade as in the embodiment shown in fig. 1.
The specific details of the industrial control system host may be understood by referring to the corresponding related descriptions and effects in the embodiment shown in fig. 1, and are not described herein again.
According to the industrial control system host provided by the embodiment of the invention, the work order task is added to the temporary white list, the work order task is executed after the starting time of the work order task is reached, a preset work order safety strategy is executed on the current work order task, a user is authorized to operate a work order upgrading package, and software is upgraded, so that the software upgrading is not limited by the white list protection or file protection strategy of the current host, and the software upgrading is carried out; the preset work order safety strategy is only executed on the current work order task, and the operation of the administrator on the work order upgrading packet is monitored, so that the work order upgrading packet authorized to be operated by the administrator can be accurately controlled, the diffusion of the authority is prevented, and the safe and reliable operation of the host computer in the software upgrading process is ensured; moreover, for the industrial control system host which is distributed and deployed by the server, the server can simultaneously send the work order tasks to the industrial control system hosts, so that the work order tasks can be issued in batches, the consistency of the work order tasks received by the industrial control system hosts is ensured, the probability of misoperation of a manager can be greatly reduced, and the efficiency of upgrading the software of the industrial control system host is improved.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a Flash Memory (Flash Memory), a Hard Disk (Hard Disk Drive, abbreviated as HDD) or a Solid State Drive (SSD), etc.; the storage medium may also comprise a combination of memories of the kind described above.
An embodiment of the present invention further provides an industrial control system, including: server and the industrial control system host computer in any of the above embodiments. The interaction principle of the server and the industrial control system host is shown in FIG. 3.
According to the industrial control system provided by the embodiment of the invention, the work order task is added to the temporary white list, the work order task is executed after the starting time of the work order task is reached, a preset work order safety strategy is executed on the current work order task, a user is authorized to operate a work order upgrading package, and software is upgraded, so that the software upgrading is not limited by the white list protection or file protection strategy of a current host, and the software is upgraded; the preset work order safety strategy is only executed on the current work order task, and the operation of the administrator on the work order upgrading packet is monitored, so that the work order upgrading packet authorized to be operated by the administrator can be accurately controlled, the diffusion of the authority is prevented, and the safe and reliable operation of the host computer in the software upgrading process is ensured; moreover, for the industrial control system host which is distributed and deployed by the server, the server can simultaneously send the work order tasks to the industrial control system hosts, so that the work order tasks can be issued in batches, the consistency of the work order tasks received by the industrial control system hosts is ensured, the probability of misoperation of a manager can be greatly reduced, and the efficiency of upgrading the software of the industrial control system host is improved.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (9)
1. A method for upgrading industrial control system host software is applied to an industrial control system host, the industrial control system host is connected with a server, and the method is characterized by comprising the following steps:
acquiring a work order task sent by the server, and adding the work order task to a temporary white list, wherein the work order task comprises a work order upgrade package, the starting time of the work order task, the ending time of the work order task and the requirement of the work order task;
periodically judging whether the current time reaches the starting time of the work order task;
if the current time reaches the starting time of the work order task, activating the work order task, and executing a preset work order safety strategy according to the work order task;
acquiring the operation of an administrator on the work order upgrading packet in the activated work order task;
judging whether the operation of the work order upgrading packet by the administrator meets the requirement of the work order task;
and if the operation of the administrator on the work order upgrading packet meets the requirement of the work order task, receiving the operation of the administrator on the work order upgrading packet, and upgrading the host software of the industrial control system according to the operation and the work order upgrading packet.
2. The method for upgrading software of a host of an industrial control system according to claim 1, wherein if the current time does not reach the start time of the work order task, the work order task is not activated and a current host security policy is implemented.
3. The method for upgrading host software of an industrial control system according to claim 1, wherein if the current time exceeds the end time of the work order task, the work order task is deleted and the current host security policy is executed.
4. The method for upgrading host software of an industrial control system according to claim 1, wherein if the operation of the work order upgrade package by the administrator does not meet the requirement of the work order task, the operation of the work order upgrade package by the administrator is not accepted, and the current host security policy is executed.
5. The method for upgrading industrial control system host software according to claim 1, further comprising, after obtaining the operation of the work order upgrade package in the activated work order task by the administrator, the following steps:
and sending the operation state of the work order upgrading packet of the administrator to the server.
6. The method for upgrading industrial control system host software according to claim 1, further comprising, after completing the upgrading of the industrial control system host software:
and updating the local white list according to the upgraded industrial control system host software.
7. The method for upgrading industrial control system host software according to claim 1, further comprising, after completing the upgrading of the industrial control system host software:
and sending the operation result of the work order upgrading packet by the administrator to the server.
8. An industrial control system host, comprising:
at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to cause the at least one processor to perform the method of industrial control system host software upgrade of any one of claims 1-7.
9. An industrial control system, comprising: a server and an industrial control system host as claimed in claim 8.
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| 李科 等: "面向工业人机界面的信息安全策略设计及实现" * |
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| CN111240708B (en) | 2023-04-28 |
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