variot - var-201301-0154

VAR-201301-0154

Vulnerability from variot - Updated: 2023-12-18 12:09

Rockwell Automation EtherNet/IP products; 1756-ENBT, 1756-EWEB, 1768-ENBT, and 1768-EWEB communication modules; CompactLogix L32E and L35E controllers; 1788-ENBT FLEXLogix adapter; 1794-AENTR FLEX I/O EtherNet/IP adapter; ControlLogix 18 and earlier; CompactLogix 18 and earlier; GuardLogix 18 and earlier; SoftLogix 18 and earlier; CompactLogix controllers 19 and earlier; SoftLogix controllers 19 and earlier; ControlLogix controllers 20 and earlier; GuardLogix controllers 20 and earlier; and MicroLogix 1100 and 1400 do not properly perform authentication for Ethernet firmware updates, which allows remote attackers to execute arbitrary code via a Trojan horse update image. Rockwell Automation MicroLogix is a programmable controller platform. The device incorrectly authenticates the user, allows the remote user to upload a new firmware image onto the Ethernet card, and does not check whether the firmware image is legitimate or corrupt, allowing an attacker to exploit the vulnerability to gain control of the device or crash the device. Rockwell's products are affected by this vulnerability: all EtherNet/IP products that comply with CIP and EtherNet/IP specifications

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CVE-2012-6437 (GCVE-0-2012-6437)

Vulnerability from cvelistv5 – Published: 2013-01-24 21:00 – Updated: 2025-06-30 22:05

Summary

The device does not properly authenticate users and the potential exists for a remote user to upload a new firmware image to the Ethernet card, whether it is a corrupt or legitimate firmware image. Successful exploitation of this vulnerability could cause loss of availability, integrity, and confidentiality and a disruption in communications with other connected devices. Rockwell Automation EtherNet/IP products; 1756-ENBT, 1756-EWEB, 1768-ENBT, and 1768-EWEB communication modules; CompactLogix L32E and L35E controllers; 1788-ENBT FLEXLogix adapter; 1794-AENTR FLEX I/O EtherNet/IP adapter; ControlLogix 18 and earlier; CompactLogix 18 and earlier; GuardLogix 18 and earlier; SoftLogix 18 and earlier; CompactLogix controllers 19 and earlier; SoftLogix controllers 19 and earlier; ControlLogix controllers 20 and earlier; GuardLogix controllers 20 and earlier; and MicroLogix 1100 and 1400

Severity ?

No CVSS data available.

CWE

CWE-287

Assigner

icscert

References

URL

Tags

	https://www.cisa.gov/news-events/ics-advisories/i…
	https://rockwellautomation.custhelp.com/app/answe…
	https://rockwellautomation.custhelp.com/app/answe…
	https://rockwellautomation.custhelp.com/app/answe…
	http://rockwellautomation.custhelp.com/app/answer…

Impacted products

Vendor

Product

Version

Rockwell Automation

1756-ENBT, 1756-EWEB, 1768-ENBT, 1768-EWEB communication modules

Affected: All

Rockwell Automation	CompactLogix L32E and L35E controllers	Affected: All
Rockwell Automation	1788-ENBT FLEXLogix adapter	Affected: All
Rockwell Automation	1794-AENTR FLEX I/O EtherNet/IP adapter	Affected: All
Rockwell Automation	ControlLogix, CompactLogix, GuardLogix, and SoftLogix	Affected: 0 , ≤ 18 (custom)
Rockwell Automation	CompactLogix and SoftLogix controllers	Affected: 0 , ≤ 19 (custom)
Rockwell Automation	ControlLogix and GuardLogix controllers	Affected: 0 , ≤ 20 (custom)
Rockwell Automation	MicroLogix	Affected: 1100 Affected: 1400

Credits

Rubén Santamarta of IOActive identified vulnerabilities in Rockwell Automation’s ControlLogix PLC and released proof-of-concept (exploit) code at the Digital Bond S4 Conference on January 19, 2012.

Show details on NVD website

JSON

To clipboard

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          "product": "CompactLogix and SoftLogix controllers",
          "vendor": "Rockwell Automation",
          "versions": [
            {
              "lessThanOrEqual": "19",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "ControlLogix and GuardLogix controllers",
          "vendor": "Rockwell Automation",
          "versions": [
            {
              "lessThanOrEqual": "20",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "MicroLogix",
          "vendor": "Rockwell Automation",
          "versions": [
            {
              "status": "affected",
              "version": "1100"
            },
            {
              "status": "affected",
              "version": "1400"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Rub\u00e9n Santamarta of IOActive identified vulnerabilities in Rockwell Automation\u2019s ControlLogix PLC and released proof-of-concept (exploit) code at the Digital Bond S4 Conference on January 19, 2012."
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003e\n\n\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003eThe device does not properly authenticate users and the potential exists for a remote user to upload a new firmware image to the Ethernet card, whether it is a corrupt or legitimate firmware image. Successful exploitation of this vulnerability could cause loss of availability, integrity, and confidentiality and a disruption in communications with other connected devices.\u003c/span\u003e\n\n\u003c/span\u003e\n\n\u003c/p\u003e\u003cp\u003eRockwell Automation EtherNet/IP products; 1756-ENBT, 1756-EWEB, 1768-ENBT, and 1768-EWEB communication modules; CompactLogix L32E and L35E controllers; 1788-ENBT FLEXLogix adapter; 1794-AENTR FLEX I/O EtherNet/IP adapter; ControlLogix 18 and earlier; CompactLogix 18 and earlier; GuardLogix 18 and earlier; SoftLogix 18 and earlier; CompactLogix controllers 19 and earlier; SoftLogix controllers 19 and earlier; ControlLogix controllers 20 and earlier; GuardLogix controllers 20 and earlier; and MicroLogix 1100 and 1400\u0026nbsp;\u003cbr\u003e\u003c/p\u003e"
            }
          ],
          "value": "The device does not properly authenticate users and the potential exists for a remote user to upload a new firmware image to the Ethernet card, whether it is a corrupt or legitimate firmware image. Successful exploitation of this vulnerability could cause loss of availability, integrity, and confidentiality and a disruption in communications with other connected devices.\n\n\n\n\n\nRockwell Automation EtherNet/IP products; 1756-ENBT, 1756-EWEB, 1768-ENBT, and 1768-EWEB communication modules; CompactLogix L32E and L35E controllers; 1788-ENBT FLEXLogix adapter; 1794-AENTR FLEX I/O EtherNet/IP adapter; ControlLogix 18 and earlier; CompactLogix 18 and earlier; GuardLogix 18 and earlier; SoftLogix 18 and earlier; CompactLogix controllers 19 and earlier; SoftLogix controllers 19 and earlier; ControlLogix controllers 20 and earlier; GuardLogix controllers 20 and earlier; and MicroLogix 1100 and 1400"
        }
      ],
      "metrics": [
        {
          "cvssV2_0": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "COMPLETE",
            "baseScore": 10,
            "confidentialityImpact": "COMPLETE",
            "integrityImpact": "COMPLETE",
            "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
            "version": "2.0"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-287",
              "description": "CWE-287",
              "lang": "en",
              "type": "CWE"
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          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-06-30T22:05:18.667Z",
        "orgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6",
        "shortName": "icscert"
      },
      "references": [
        {
          "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-13-011-03"
        },
        {
          "url": "https://rockwellautomation.custhelp.com/app/answers/detail/a_id/470154"
        },
        {
          "url": "https://rockwellautomation.custhelp.com/app/answers/detail/aid/470155"
        },
        {
          "url": "https://rockwellautomation.custhelp.com/app/answers/detail/aid/470156"
        },
        {
          "url": "http://rockwellautomation.custhelp.com/app/answers/detail/a_id/54102"
        }
      ],
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          "lang": "en",
          "supportingMedia": [
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              "value": "\u003cp\u003eAccording to Rockwell, any of the above products that become affected by a vulnerability can be reset by rebooting or power cycling the affected product. After the reboot, the affected product may require some reconfiguration.\u003c/p\u003e\u003cp\u003eTo mitigate the vulnerabilities, Rockwell has developed and released security patches on July 18, 2012, to address each of the issues. To download and install the patches please refer to Rockwell\u2019s Advisories at:\u003c/p\u003e\u003cp\u003e\u003ca target=\"_blank\" rel=\"nofollow\" href=\"https://rockwellautomation.custhelp.com/app/answers/detail/a_id/470154\"\u003ehttps://rockwellautomation.custhelp.com/app/answers/detail/a_id/470154\u003c/a\u003e\u003cbr\u003e\u003ca target=\"_blank\" rel=\"nofollow\" href=\"https://rockwellautomation.custhelp.com/app/answers/detail/aid/470155\"\u003ehttps://rockwellautomation.custhelp.com/app/answers/detail/aid/470155\u003c/a\u003e\u003cbr\u003e\u003ca target=\"_blank\" rel=\"nofollow\" href=\"https://rockwellautomation.custhelp.com/app/answers/detail/aid/470156\"\u003ehttps://rockwellautomation.custhelp.com/app/answers/detail/aid/470156\u003c/a\u003e\u003c/p\u003e\u003cp\u003eFor more information on security with Rockwell Automation products, please refer to \u003ca target=\"_blank\" rel=\"nofollow\" href=\"http://rockwellautomation.custhelp.com/app/answers/detail/a_id/54102\"\u003eRockwell\u2019s Security Advisory Index\u003c/a\u003e.\u003c/p\u003e"
            }
          ],
          "value": "According to Rockwell, any of the above products that become affected by a vulnerability can be reset by rebooting or power cycling the affected product. After the reboot, the affected product may require some reconfiguration.\n\nTo mitigate the vulnerabilities, Rockwell has developed and released security patches on July 18, 2012, to address each of the issues. To download and install the patches please refer to Rockwell\u2019s Advisories at:\n\n https://rockwellautomation.custhelp.com/app/answers/detail/a_id/470154 \n https://rockwellautomation.custhelp.com/app/answers/detail/aid/470155 \n https://rockwellautomation.custhelp.com/app/answers/detail/aid/470156 \n\nFor more information on security with Rockwell Automation products, please refer to  Rockwell\u2019s Security Advisory Index http://rockwellautomation.custhelp.com/app/answers/detail/a_id/54102 ."
        }
      ],
      "source": {
        "advisory": "ICSA-13-011-03",
        "discovery": "EXTERNAL"
      },
      "title": "Rockwell Automation ControlLogix PLC Improper Authentication",
      "workarounds": [
        {
          "lang": "en",
          "supportingMedia": [
            {
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              "value": "\u003cp\u003eRockwell recommends updating to the newest firmware patches to fix the vulnerabilities, but if not able to do so right away, then Rockwell advises immediately employing the following mitigations for each of the affected products.\u003c/p\u003e\u003cp\u003e\u003c/p\u003e\n\n\u003cp\u003eTo mitigate the vulnerability with the Web server password authentication mechanism:\u003c/p\u003e\u003col\u003e\u003cli\u003eUpgrade the MicroLogix 1400 firmware to FRN 12 or higher.\u003c/li\u003e\u003cli\u003eBecause of limitations in the MicroLogix 1100 platform, none of the firmware updates will be able to fix this issue, so users should use the following techniques to help reduce the likelihood of compromise.\u003c/li\u003e\u003cli\u003eWhere possible, disable the Web server and change all default Administrator and Guest passwords.\u003c/li\u003e\u003cli\u003eIf Web server functionality is needed, then Rockwell recommends upgrading the product\u2019s firmware to the most current version to have the newest enhanced protections available such as:\u003col\u003e\u003cli\u003eWhen a controller receives two consecutive invalid authentication requests from an HTTP client, the controller resets the Authentication Counter after 60 minutes.\u003c/li\u003e\u003cli\u003eWhen a controller receives 10 invalid authentication requests from any HTTP client, it will not accept any valid or invalid authentication packets until a 24-hour HTTP Server Lock Timer timeout.\u003c/li\u003e\u003c/ol\u003e\u003c/li\u003e\u003cli\u003eIf Web server functionality is needed, Rockwell also recommends configuring user accounts to have READ only access to the product so those accounts cannot be used to make configuration change\u003c/li\u003e\u003c/ol\u003e\u003cp\u003eIn addition to the above, Rockwell recommends concerned customers remain vigilant and continue to follow security strategies that help reduce risk and enhance overall control system security. Where possible, they suggest you apply multiple recommendations and complement this list with your own best-practices:\u003c/p\u003e\u003col\u003e\u003cli\u003eEmploy layered security and defense-in-depth methods in system design to restrict and control access to individual products and control networks. Refer to \u003ca target=\"_blank\" rel=\"nofollow\" href=\"http://www.ab.com/networks/architectures.html\"\u003ehttp://www.ab.com/networks/architectures.html\u003c/a\u003e for comprehensive information about implementing validated architectures designed to deliver these measures.\u003c/li\u003e\u003cli\u003eRestrict physical and electronic access to automation products, networks, and systems to only those individuals authorized to be in contact with control system equipment.\u003c/li\u003e\u003cli\u003eEmploy firewalls with ingress/egress filtering, intrusion detection/prevention systems, and validate all configurations. Evaluate firewall configurations to ensure other appropriate inbound and outbound traffic is blocked.\u003c/li\u003e\u003cli\u003eUse up-to-date end-point protection software (e.g., antivirus/antimalware software) on all PC-based assets.\u003c/li\u003e\u003cli\u003eMake sure that software and control system device firmware is patched to current releases.\u003c/li\u003e\u003cli\u003ePeriodically change passwords in control system components and infrastructure devices.\u003c/li\u003e\u003cli\u003eWhere applicable, set the controller key-switch/mode-switch to RUN mode.\u003c/li\u003e\u003c/ol\u003e\n\n\n\n\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003eFor more information on security with Rockwell Automation products, please refer to \u003c/span\u003e\u003ca target=\"_blank\" rel=\"nofollow\" href=\"http://rockwellautomation.custhelp.com/app/answers/detail/a_id/54102\"\u003eRockwell\u2019s Security Advisory Index\u003c/a\u003e\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003e.\u003c/span\u003e\n\n\u003cbr\u003e"
            }
          ],
          "value": "Rockwell recommends updating to the newest firmware patches to fix the vulnerabilities, but if not able to do so right away, then Rockwell advises immediately employing the following mitigations for each of the affected products.\n\n\n\n\n\nTo mitigate the vulnerability with the Web server password authentication mechanism:\n\n  *  Upgrade the MicroLogix 1400 firmware to FRN 12 or higher.\n  *  Because of limitations in the MicroLogix 1100 platform, none of the firmware updates will be able to fix this issue, so users should use the following techniques to help reduce the likelihood of compromise.\n  *  Where possible, disable the Web server and change all default Administrator and Guest passwords.\n  *  If Web server functionality is needed, then Rockwell recommends upgrading the product\u2019s firmware to the most current version to have the newest enhanced protections available such as:  *  When a controller receives two consecutive invalid authentication requests from an HTTP client, the controller resets the Authentication Counter after 60 minutes.\n  *  When a controller receives 10 invalid authentication requests from any HTTP client, it will not accept any valid or invalid authentication packets until a 24-hour HTTP Server Lock Timer timeout.\n\n  *  If Web server functionality is needed, Rockwell also recommends configuring user accounts to have READ only access to the product so those accounts cannot be used to make configuration change\nIn addition to the above, Rockwell recommends concerned customers remain vigilant and continue to follow security strategies that help reduce risk and enhance overall control system security. Where possible, they suggest you apply multiple recommendations and complement this list with your own best-practices:\n\n  *  Employ layered security and defense-in-depth methods in system design to restrict and control access to individual products and control networks. Refer to  http://www.ab.com/networks/architectures.html  for comprehensive information about implementing validated architectures designed to deliver these measures.\n  *  Restrict physical and electronic access to automation products, networks, and systems to only those individuals authorized to be in contact with control system equipment.\n  *  Employ firewalls with ingress/egress filtering, intrusion detection/prevention systems, and validate all configurations. Evaluate firewall configurations to ensure other appropriate inbound and outbound traffic is blocked.\n  *  Use up-to-date end-point protection software (e.g., antivirus/antimalware software) on all PC-based assets.\n  *  Make sure that software and control system device firmware is patched to current releases.\n  *  Periodically change passwords in control system components and infrastructure devices.\n  *  Where applicable, set the controller key-switch/mode-switch to RUN mode.\n\n\n\n\nFor more information on security with Rockwell Automation products, please refer to  Rockwell\u2019s Security Advisory Index http://rockwellautomation.custhelp.com/app/answers/detail/a_id/54102 ."
        }
      ],
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      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "ics-cert@hq.dhs.gov",
          "ID": "CVE-2012-6439",
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              "value": "Rockwell Automation EtherNet/IP products; 1756-ENBT, 1756-EWEB, 1768-ENBT, and 1768-EWEB communication modules; CompactLogix L32E and L35E controllers; 1788-ENBT FLEXLogix adapter; 1794-AENTR FLEX I/O EtherNet/IP adapter; ControlLogix 18 and earlier; CompactLogix 18 and earlier; GuardLogix 18 and earlier; SoftLogix 18 and earlier; CompactLogix controllers 19 and earlier; SoftLogix controllers 19 and earlier; ControlLogix controllers 20 and earlier; GuardLogix controllers 20 and earlier; and MicroLogix 1100 and 1400 allow remote attackers to cause a denial of service (control and communication outage) via a CIP message that modifies the (1) configuration or (2) network parameters."
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  "cveMetadata": {
    "assignerOrgId": "7d14cffa-0d7d-4270-9dc0-52cabd5a23a6",
    "assignerShortName": "icscert",
    "cveId": "CVE-2012-6437",
    "datePublished": "2013-01-24T21:00:00Z",
    "dateReserved": "2012-12-26T00:00:00Z",
    "dateUpdated": "2025-06-30T22:05:18.667Z",
    "state": "PUBLISHED"
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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.

Action not permitted

VAR-201301-0154

CVE-2012-6437 (GCVE-0-2012-6437)

Tags

Sightings

Nomenclature