VDE-2023-025

Vulnerability from csaf_codesysgmbh - Published: 2023-08-03 11:18 - Updated: 2023-08-03 11:18
Summary
CODESYS: Control runtime system memory and integrity check vulnerabilities
Notes
Summary: The CODESYS Control V3 runtime system does not restrict the memory accesses of the PLC application code to the PLC application data and does not sufficiently check the integrity of the application code by default. This could be exploited by authenticated PLC programmers.
Impact: The CODESYS Control runtime system enables embedded or PC-based devices to be a programmable industrial controller. Control programs (PLC application code) can access local or remote IOs, communication interfaces such as serial or sockets, or the file system.
Mitigation: To exploit these vulnerabilities, a successful login to the affected product is required. The online user management therefore protects from exploiting these security vulnerabilities. CODESYS GmbH strongly recommends using the online user management. This not only prevents from downloading malicious code or boot application files, but also suppresses starting, stopping, debugging or other actions on a known working application that could potentially disrupt a machine or system. As of version 3.5.17.0, the online user management is enforced by default. In addition, the CODESYS Development System and the CODESYS Control runtime system support optional signing and encryption of the application code loaded on the controller. This feature also prevents the loading and execution of untrusted or modified boot files. If the application code security policy is set to "Enforced Signing", a modified or untrusted application will be detected due to a missing signature and will not be loaded and executed.
CVE-2022-4046

In CODESYS Control in multiple versions a improper restriction of operations within the bounds of a memory buffer allow an remote attacker with user privileges to gain full access of the device.

8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
Mitigation To exploit these vulnerabilities, a successful login to the affected product is required. The online user management therefore protects from exploiting these security vulnerabilities. CODESYS GmbH strongly recommends using the online user management. This not only prevents from downloading malicious code or boot application files, but also suppresses starting, stopping, debugging or other actions on a known working application that could potentially disrupt a machine or system. As of version 3.5.17.0, the online user management is enforced by default. In addition, the CODESYS Development System and the CODESYS Control runtime system support optional signing and encryption of the application code loaded on the controller. This feature also prevents the loading and execution of untrusted or modified boot files. If the application code security policy is set to "Enforced Signing", a modified or untrusted application will be detected due to a missing signature and will not be loaded and executed.
CVE-2023-28355

The PLC application code executed by the CODESYS Control Runtime contains a checksum. This enables the CODESYS development system to check at login whether its loaded project matches the PLC application code executed on the controller. This checksum is not sufficient to reliably detect PLC application code that has been modified in memory or boot application files that have been manipulated.

7.7 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N
CWE-354 - Improper Validation of Integrity Check Value
Mitigation To exploit these vulnerabilities, a successful login to the affected product is required. The online user management therefore protects from exploiting these security vulnerabilities. CODESYS GmbH strongly recommends using the online user management. This not only prevents from downloading malicious code or boot application files, but also suppresses starting, stopping, debugging or other actions on a known working application that could potentially disrupt a machine or system. As of version 3.5.17.0, the online user management is enforced by default. In addition, the CODESYS Development System and the CODESYS Control runtime system support optional signing and encryption of the application code loaded on the controller. This feature also prevents the loading and execution of untrusted or modified boot files. If the application code security policy is set to "Enforced Signing", a modified or untrusted application will be detected due to a missing signature and will not be loaded and executed.
References
Acknowledgments
CERT@VDE certvde.com
Dragos Inc. Reid Wightman
To clipboard 

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        "text": "The CODESYS Control V3 runtime system does not restrict the memory accesses of the PLC application code to the PLC application data and does not sufficiently check the integrity of the application code by default. This could be exploited by authenticated PLC programmers.",
        "title": "Summary"
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  "vulnerabilities": [
    {
      "cve": "CVE-2022-4046",
      "cwe": {
        "id": "CWE-119",
        "name": "Improper Restriction of Operations within the Bounds of a Memory Buffer"
      },
      "notes": [
        {
          "category": "description",
          "text": "In CODESYS Control in multiple versions a improper restriction of operations within the bounds of a memory buffer allow an remote attacker with user privileges to gain full access of the device.",
          "title": "Vulnerability Description"
        }
      ],
      "product_status": {
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          "CSAFPID-51002",
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          "CSAFPID-51006",
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          "CSAFPID-510011",
          "CSAFPID-510012",
          "CSAFPID-510013",
          "CSAFPID-510014"
        ]
      },
      "remediations": [
        {
          "category": "mitigation",
          "details": "To exploit these vulnerabilities, a successful login to the affected product is required. The online user management therefore protects from exploiting these security vulnerabilities.\n\n\nCODESYS GmbH strongly recommends using the online user management. This not only prevents from downloading malicious code or boot application files, but also suppresses starting, stopping, debugging or other actions on a known working application that could potentially disrupt a machine or system. As of version 3.5.17.0, the online user management is enforced by default.\n\n\nIn addition, the CODESYS Development System and the CODESYS Control runtime system support optional signing and encryption of the application code loaded on the controller. This feature also prevents the loading and execution of untrusted or modified boot files. If the application code security policy is set to \"Enforced Signing\", a modified or untrusted application will be detected due to a missing signature and will not be loaded and executed.",
          "group_ids": [
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            "baseScore": 8.8,
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            "environmentalScore": 8.8,
            "environmentalSeverity": "HIGH",
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            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "temporalScore": 8.8,
            "temporalSeverity": "HIGH",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-51001",
            "CSAFPID-51002",
            "CSAFPID-51003",
            "CSAFPID-51004",
            "CSAFPID-51005",
            "CSAFPID-51006",
            "CSAFPID-51007",
            "CSAFPID-51008",
            "CSAFPID-51009",
            "CSAFPID-510010",
            "CSAFPID-510011",
            "CSAFPID-510012",
            "CSAFPID-510013",
            "CSAFPID-510014"
          ]
        }
      ],
      "title": "CVE-2022-4046"
    },
    {
      "cve": "CVE-2023-28355",
      "cwe": {
        "id": "CWE-354",
        "name": "Improper Validation of Integrity Check Value"
      },
      "notes": [
        {
          "category": "description",
          "text": "The PLC application code executed by the CODESYS Control Runtime contains a checksum. This enables the CODESYS development system to check at login whether its loaded project matches the PLC application code executed on the controller. This checksum is not sufficient to reliably detect PLC application code that has been modified in memory or boot application files that have been manipulated.",
          "title": "Vulnerability Description"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-51001",
          "CSAFPID-51002",
          "CSAFPID-51003",
          "CSAFPID-51004",
          "CSAFPID-51005",
          "CSAFPID-51006",
          "CSAFPID-51007",
          "CSAFPID-51008",
          "CSAFPID-51009",
          "CSAFPID-510010",
          "CSAFPID-510011",
          "CSAFPID-510012",
          "CSAFPID-510013",
          "CSAFPID-510014"
        ]
      },
      "remediations": [
        {
          "category": "mitigation",
          "details": "To exploit these vulnerabilities, a successful login to the affected product is required. The online user management therefore protects from exploiting these security vulnerabilities.\n\n\nCODESYS GmbH strongly recommends using the online user management. This not only prevents from downloading malicious code or boot application files, but also suppresses starting, stopping, debugging or other actions on a known working application that could potentially disrupt a machine or system. As of version 3.5.17.0, the online user management is enforced by default.\n\n\nIn addition, the CODESYS Development System and the CODESYS Control runtime system support optional signing and encryption of the application code loaded on the controller. This feature also prevents the loading and execution of untrusted or modified boot files. If the application code security policy is set to \"Enforced Signing\", a modified or untrusted application will be detected due to a missing signature and will not be loaded and executed.",
          "group_ids": [
            "CSAFGID-0001"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.7,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "environmentalScore": 7.7,
            "environmentalSeverity": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "temporalScore": 7.7,
            "temporalSeverity": "HIGH",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-51001",
            "CSAFPID-51002",
            "CSAFPID-51003",
            "CSAFPID-51004",
            "CSAFPID-51005",
            "CSAFPID-51006",
            "CSAFPID-51007",
            "CSAFPID-51008",
            "CSAFPID-51009",
            "CSAFPID-510010",
            "CSAFPID-510011",
            "CSAFPID-510012",
            "CSAFPID-510013",
            "CSAFPID-510014"
          ]
        }
      ],
      "title": "CVE-2023-28355"
    }
  ]
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.