icsa-22-132-13
Vulnerability from csaf_cisa
Published
2022-05-12 00:00
Modified
2022-06-16 00:00
Summary
Siemens Industrial Devices using libcurl

Notes

CISA Disclaimer
This CSAF advisory was extracted from unstructured data and may contain inaccuracies. If you notice any errors, please reach out to the designated contact at CISA CSAF: central@cisa.dhs.gov
Legal Notice
All information products included in https://us-cert.cisa.gov/ics are provided "as is" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained within. DHS does not endorse any commercial product or service, referenced in this product or otherwise. Further dissemination of this product is governed by the Traffic Light Protocol (TLP) marking in the header. For more information about TLP, see https://us-cert.cisa.gov/tlp/.
Risk evaluation
Successful exploitation of these vulnerabilities could crash and allow an attacker to interfere with the affected products in various ways.
Critical infrastructure sectors
Critical Manufacturing
Countries/areas deployed
Worldwide
Company headquarters location
Germany
Recommended Practices
CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should:
Recommended Practices
CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
Recommended Practices
Additional mitigation guidance and recommended practices are publicly available on the ICS webpage on cisa.gov/ics in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies. Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to CISA for tracking and correlation against other incidents.
Additional Resources
For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories
Exploitability
No known public exploits specifically target these vulnerabilities. These vulnerabilities have a high attack complexity.


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        "organization": "Siemens",
        "summary": "notifying CISA these devices are affected by these known vulnerabilities"
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        "title": "CISA Disclaimer"
      },
      {
        "category": "legal_disclaimer",
        "text": "All information products included in https://us-cert.cisa.gov/ics are provided \"as is\" for informational purposes only. The Department of Homeland Security (DHS) does not provide any warranties of any kind regarding any information contained within. DHS does not endorse any commercial product or service, referenced in this product or otherwise. Further dissemination of this product is governed by the Traffic Light Protocol (TLP) marking in the header. For more information about TLP, see https://us-cert.cisa.gov/tlp/.",
        "title": "Legal Notice"
      },
      {
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        "text": "Successful exploitation of these vulnerabilities could crash and allow an attacker to interfere with the affected products in various ways.",
        "title": "Risk evaluation"
      },
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        "text": "CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should:",
        "title": "Recommended Practices"
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        "title": "Recommended Practices"
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      "namespace": "https://www.cisa.gov/"
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    "references": [
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            ],
            "category": "product_name",
            "name": "SIPLUS NET CP 1543-1"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V3.3.46",
                "product": {
                  "name": "SIPLUS S7-1200 CP 1243-1",
                  "product_id": "CSAFPID-00033",
                  "product_identification_helper": {
                    "model_numbers": [
                      "6AG1243-1BX30-2AX0"
                    ]
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "SIPLUS S7-1200 CP 1243-1"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c V3.3.46",
                "product": {
                  "name": "SIPLUS S7-1200 CP 1243-1 RAIL",
                  "product_id": "CSAFPID-00034",
                  "product_identification_helper": {
                    "model_numbers": [
                      "6AG2243-1BX30-1XE0"
                    ]
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "SIPLUS S7-1200 CP 1243-1 RAIL"
          }
        ],
        "category": "vendor",
        "name": "Siemens"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2021-22901",
      "cwe": {
        "id": "CWE-416",
        "name": "Use After Free"
      },
      "notes": [
        {
          "category": "summary",
          "text": "curl 7.75.0 through 7.76.1 suffers from a use-after-free vulnerability resulting in already freed memory being used when a TLS 1.3 session ticket arrives over a connection. A malicious server can use this in rare unfortunate circumstances to potentially reach remote code execution in the client. When libcurl at run-time sets up support for TLS 1.3 session tickets on a connection using OpenSSL, it stores pointers to the transfer in-memory object for later retrieval when a session ticket arrives. If the connection is used by multiple transfers (like with a reused HTTP/1.1 connection or multiplexed HTTP/2 connection) that first transfer object might be freed before the new session is established on that connection and then the function will access a memory buffer that might be freed. When using that memory, libcurl might even call a function pointer in the object, making it possible for a remote code execution if the server could somehow manage to get crafted memory content into the correct place in memory.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-00019",
          "CSAFPID-00020",
          "CSAFPID-00021",
          "CSAFPID-00022",
          "CSAFPID-00023",
          "CSAFPID-00024",
          "CSAFPID-00025",
          "CSAFPID-00031",
          "CSAFPID-00032",
          "CSAFPID-00033",
          "CSAFPID-00034"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "web.nvd.nist.gov",
          "url": "http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-22901"
        },
        {
          "category": "external",
          "summary": "www.first.org",
          "url": "https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "Update to V1.1 or later version",
          "product_ids": [
            "CSAFPID-00025"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109811116/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V3.0.22 or later version",
          "product_ids": [
            "CSAFPID-00024",
            "CSAFPID-00032"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109808678"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V3.3.46 or later version",
          "product_ids": [
            "CSAFPID-00019",
            "CSAFPID-00020",
            "CSAFPID-00021",
            "CSAFPID-00022",
            "CSAFPID-00023",
            "CSAFPID-00031",
            "CSAFPID-00033",
            "CSAFPID-00034"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109812218"
        },
        {
          "category": "mitigation",
          "details": "As a general security measure, Siemens strongly recommends to protect\nnetwork access to devices with appropriate mechanisms. In order to\noperate the devices in a protected IT environment, Siemens recommends\nto configure the environment according to Siemens\u0027 operational\nguidelines for Industrial Security (Download:\nhttps://www.siemens.com/cert/operational-guidelines-industrial-\nsecurity), and to follow the recommendations in the product manuals.\n\nAdditional information on Industrial Security by Siemens can be found\nat: https://www.siemens.com/industrialsecurity",
          "product_ids": [
            "CSAFPID-00019",
            "CSAFPID-00020",
            "CSAFPID-00021",
            "CSAFPID-00022",
            "CSAFPID-00023",
            "CSAFPID-00024",
            "CSAFPID-00025",
            "CSAFPID-00031",
            "CSAFPID-00032",
            "CSAFPID-00033",
            "CSAFPID-00034"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-00019",
            "CSAFPID-00020",
            "CSAFPID-00021",
            "CSAFPID-00022",
            "CSAFPID-00023",
            "CSAFPID-00024",
            "CSAFPID-00025",
            "CSAFPID-00031",
            "CSAFPID-00032",
            "CSAFPID-00033",
            "CSAFPID-00034"
          ]
        }
      ],
      "title": "CVE-2021-22901"
    },
    {
      "cve": "CVE-2021-22924",
      "cwe": {
        "id": "CWE-706",
        "name": "Use of Incorrectly-Resolved Name or Reference"
      },
      "notes": [
        {
          "category": "summary",
          "text": "libcurl keeps previously used connections in a connection pool for subsequent transfers to reuse, if one of them matches the setup. Due to errors in the logic, the config matching function did not take \u0027issuercert\u0027 into account and it compared the involved paths *case insensitively*, which could lead to libcurl reusing wrong connections. File paths are, or can be, case sensitive on many systems but not all, and can even vary depending on used file systems. The comparison also didn\u0027t include the \u0027issuer cert\u0027 which a transfer can set to qualify how to verify the server certificate.",
          "title": "Summary"
        }
      ],
      "product_status": {
        "known_affected": [
          "CSAFPID-0001",
          "CSAFPID-0002",
          "CSAFPID-0003",
          "CSAFPID-0004",
          "CSAFPID-0005",
          "CSAFPID-0006",
          "CSAFPID-0007",
          "CSAFPID-0008",
          "CSAFPID-0009",
          "CSAFPID-00010",
          "CSAFPID-00011",
          "CSAFPID-00012",
          "CSAFPID-00013",
          "CSAFPID-00014",
          "CSAFPID-00015",
          "CSAFPID-00016",
          "CSAFPID-00017",
          "CSAFPID-00018",
          "CSAFPID-00019",
          "CSAFPID-00020",
          "CSAFPID-00021",
          "CSAFPID-00022",
          "CSAFPID-00023",
          "CSAFPID-00024",
          "CSAFPID-00025",
          "CSAFPID-00026",
          "CSAFPID-00027",
          "CSAFPID-00028",
          "CSAFPID-00029",
          "CSAFPID-00030",
          "CSAFPID-00031",
          "CSAFPID-00032",
          "CSAFPID-00033",
          "CSAFPID-00034"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "web.nvd.nist.gov",
          "url": "http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-22924"
        },
        {
          "category": "external",
          "summary": "www.first.org",
          "url": "https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C"
        }
      ],
      "remediations": [
        {
          "category": "mitigation",
          "details": "Use the certificate projection feature to pin the valid certificates\nof external servers providing the services E-mail and DynDNS to the\naffected devices. To do this, see the description in the sections \"Ca\nCertificate\" in the chapters \"E-Mail\" and \"DynDNS\" in the manual",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "no_fix_planned",
          "details": "Currently no fix is planned",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Update to V7.1 or later version",
          "product_ids": [
            "CSAFPID-0002",
            "CSAFPID-0003",
            "CSAFPID-0004",
            "CSAFPID-0005",
            "CSAFPID-0006",
            "CSAFPID-0007",
            "CSAFPID-0008",
            "CSAFPID-0009",
            "CSAFPID-00010",
            "CSAFPID-00011",
            "CSAFPID-00012",
            "CSAFPID-00013",
            "CSAFPID-00014",
            "CSAFPID-00015",
            "CSAFPID-00016",
            "CSAFPID-00017",
            "CSAFPID-00018"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109807276"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V1.1 or later version",
          "product_ids": [
            "CSAFPID-00025"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109811116/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V3.0.22 or later version",
          "product_ids": [
            "CSAFPID-00024",
            "CSAFPID-00032"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109808678"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V5.0.14 or later version",
          "product_ids": [
            "CSAFPID-00026",
            "CSAFPID-00027",
            "CSAFPID-00028",
            "CSAFPID-00029"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109810215/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V3.1 or later version",
          "product_ids": [
            "CSAFPID-00030"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109811169/"
        },
        {
          "category": "vendor_fix",
          "details": "Update to V3.3.46 or later version",
          "product_ids": [
            "CSAFPID-00019",
            "CSAFPID-00020",
            "CSAFPID-00021",
            "CSAFPID-00022",
            "CSAFPID-00023",
            "CSAFPID-00031",
            "CSAFPID-00033",
            "CSAFPID-00034"
          ],
          "url": "https://support.industry.siemens.com/cs/ww/en/view/109812218"
        },
        {
          "category": "mitigation",
          "details": "As a general security measure, Siemens strongly recommends to protect\nnetwork access to devices with appropriate mechanisms. In order to\noperate the devices in a protected IT environment, Siemens recommends\nto configure the environment according to Siemens\u0027 operational\nguidelines for Industrial Security (Download:\nhttps://www.siemens.com/cert/operational-guidelines-industrial-\nsecurity), and to follow the recommendations in the product manuals.\n\nAdditional information on Industrial Security by Siemens can be found\nat: https://www.siemens.com/industrialsecurity",
          "product_ids": [
            "CSAFPID-0001",
            "CSAFPID-0002",
            "CSAFPID-0003",
            "CSAFPID-0004",
            "CSAFPID-0005",
            "CSAFPID-0006",
            "CSAFPID-0007",
            "CSAFPID-0008",
            "CSAFPID-0009",
            "CSAFPID-00010",
            "CSAFPID-00011",
            "CSAFPID-00012",
            "CSAFPID-00013",
            "CSAFPID-00014",
            "CSAFPID-00015",
            "CSAFPID-00016",
            "CSAFPID-00017",
            "CSAFPID-00018",
            "CSAFPID-00019",
            "CSAFPID-00020",
            "CSAFPID-00021",
            "CSAFPID-00022",
            "CSAFPID-00023",
            "CSAFPID-00024",
            "CSAFPID-00025",
            "CSAFPID-00026",
            "CSAFPID-00027",
            "CSAFPID-00028",
            "CSAFPID-00029",
            "CSAFPID-00030",
            "CSAFPID-00031",
            "CSAFPID-00032",
            "CSAFPID-00033",
            "CSAFPID-00034"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 3.7,
            "baseSeverity": "LOW",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "CSAFPID-0001",
            "CSAFPID-0002",
            "CSAFPID-0003",
            "CSAFPID-0004",
            "CSAFPID-0005",
            "CSAFPID-0006",
            "CSAFPID-0007",
            "CSAFPID-0008",
            "CSAFPID-0009",
            "CSAFPID-00010",
            "CSAFPID-00011",
            "CSAFPID-00012",
            "CSAFPID-00013",
            "CSAFPID-00014",
            "CSAFPID-00015",
            "CSAFPID-00016",
            "CSAFPID-00017",
            "CSAFPID-00018",
            "CSAFPID-00019",
            "CSAFPID-00020",
            "CSAFPID-00021",
            "CSAFPID-00022",
            "CSAFPID-00023",
            "CSAFPID-00024",
            "CSAFPID-00025",
            "CSAFPID-00026",
            "CSAFPID-00027",
            "CSAFPID-00028",
            "CSAFPID-00029",
            "CSAFPID-00030",
            "CSAFPID-00031",
            "CSAFPID-00032",
            "CSAFPID-00033",
            "CSAFPID-00034"
          ]
        }
      ],
      "title": "CVE-2021-22924"
    }
  ]
}


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