Vulnerability-Lookup

Search criteria

Vendor

Product

Assigner (CNA or root)

Sources

Sort by

Order

CVSS min

CVSS max

Apply ordering (override relevance)

CVE-2026-119776 (GCVE-0-2026-119776)

Vulnerability from cvelistv5 – Published: 2026-11-04 14:15 – Updated: 2026-11-09 21:11

Title

frr: ospf6d fails to enforce all OSPFv3 packets use IPv6 link-local addresses

Summary

In all prior released versions of FRRouting, the OSPFv3 (for IPv6) implementation does not check that OSPFv3 packets have a link-local source address and either a link-local destination or one of the protocol multicast destination groups. This may enable malicious actors to establish OSPFv3 adjacencies from unexpectedly, distant IPv6 hosts. Proper usage of OSPFv3 authentication trailers (RFC 7166, as is best practice) prevents full exploitation of this issue, though may allow a malicious actor to waste CPU on authentication checks. Note the linked PR #23935 is not sufficient to fix the issue as it only verifies the source address. It is the destination address that must be checked. Required configuration: The OSPFv3 for IPv6 routing protocol must be running (ospf6d process) and in use (enabled globally with "router ospf6" and on specific interfaces with "ipv6 ospf6 area".) Workaround: either: * configure OSPFv3 authentication trailers ("ipv6 ospf6 authentication") * or ensure through firewall configuration that only packets with link-local or multicast destination addresses are accepted on input for IPv6 protocol 89 (OSPF). Note that checking the source address is insufficient, as some routers may (unexpectedly) forward packets with global-scoped IPv6 destination addresses even if they have link-local source addresses.

Severity

6.1 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/AU:Y

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-11-09 21:10 UTC

CWE

CWE-304 - Missing critical step in authentication: protocol interactions should be limited to IPv6 link-local scope

Assigner

NetDEF CNA

References

3 references

URL	Tags
https://github.com/FRRouting/frr/pull/24183/chang…	patch
https://github.com/FRRouting/frr/pull/24183	related
https://github.com/FRRouting/frr/pull/23935	related

Impacted products

1 product

Vendor	Product	Version
frrouting	frrouting	Affected: 0 , < * (git) cpe:2.3:a:frrouting:frrouting::::::::

Credits

Bing Shui <bingshui@smail.nju.edu.cn> (not reported as security issue) Anthropic OSS-scanner (re-report, ANT-2026-N0E1INIV)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-119776",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-11-09T21:10:58.734852Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-11-09T21:11:30.420Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "affected",
          "modules": [
            "ospf6d"
          ],
          "product": "frrouting",
          "programFiles": [
            "ospf6d/ospf6_message.c"
          ],
          "repo": "https://github.com/FRRouting/frr/",
          "vendor": "frrouting",
          "versions": [
            {
              "changes": [
                {
                  "at": "eaccfcdb35bce8d94621b06633417ba3fa657f34",
                  "status": "unaffected"
                }
              ],
              "lessThan": "*",
              "status": "affected",
              "version": "0",
              "versionType": "git"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:frrouting:frrouting:*:*:*:*:*:*:*:*",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ],
          "operator": "OR"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "Bing Shui \u003cbingshui@smail.nju.edu.cn\u003e (not reported as security issue)"
        },
        {
          "lang": "en",
          "type": "tool",
          "value": "Anthropic OSS-scanner (re-report, ANT-2026-N0E1INIV)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In all prior released versions of FRRouting, the OSPFv3 (for IPv6) implementation does not check that OSPFv3 packets have a link-local source address and either a link-local destination or one of the protocol multicast destination groups.  This may enable malicious actors to establish OSPFv3 adjacencies from unexpectedly, distant IPv6 hosts. Proper usage of OSPFv3 authentication trailers (RFC 7166, as is best practice) prevents full exploitation of this issue, though may allow a malicious actor to waste CPU on authentication checks.\n\n\nNote the linked PR #23935 is not sufficient to fix the issue as it only verifies the source address. It is the destination address that must be checked.\n\n\nRequired configuration: The OSPFv3 for IPv6 routing protocol must be running (ospf6d process) and in use (enabled globally with\u00a0\"router ospf6\" and on specific interfaces with \"ipv6 ospf6 area\".)\n\n\nWorkaround: either:\n\n  *  configure OSPFv3 authentication trailers (\"ipv6 ospf6 authentication\")\n  *  or ensure through firewall configuration that only packets with link-local or multicast destination addresses are accepted on input for IPv6 protocol 89 (OSPF). Note that checking the source address is insufficient, as some routers may (unexpectedly) forward packets with global-scoped IPv6 destination addresses even if they have link-local source addresses."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "YES",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 6.1,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/AU:Y",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "LOW",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-304",
              "description": "CWE-304 Missing critical step in authentication: protocol interactions should be limited to IPv6 link-local scope",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-04T16:53:47.660Z",
        "orgId": "57a55968-44ac-464c-a794-6ba3baad09c4",
        "shortName": "NetDEF"
      },
      "references": [
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/FRRouting/frr/pull/24183/changes/eaccfcdb35bce8d94621b06633417ba3fa657f34"
        },
        {
          "tags": [
            "related"
          ],
          "url": "https://github.com/FRRouting/frr/pull/24183"
        },
        {
          "tags": [
            "related"
          ],
          "url": "https://github.com/FRRouting/frr/pull/23935"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "frr: ospf6d fails to enforce all OSPFv3 packets use IPv6 link-local addresses",
      "workarounds": [
        {
          "lang": "en",
          "value": "Either:\n\n  *  configure OSPFv3 authentication trailers (\"ipv6 ospf6 authentication\")\n  *  or ensure through firewall configuration that only packets with link-local or multicast destination addresses are accepted on input for IPv6 protocol 89 (OSPF). Note that checking the source address is insufficient, as some routers may (unexpectedly) forward packets with global-scoped IPv6 destination addresses even if they have link-local source addresses."
        }
      ],
      "x_generator": {
        "engine": "vim"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "57a55968-44ac-464c-a794-6ba3baad09c4",
    "assignerShortName": "NetDEF",
    "cveId": "CVE-2026-119776",
    "datePublished": "2026-11-04T14:15:32.391Z",
    "dateReserved": "2026-10-30T16:14:17.897Z",
    "dateUpdated": "2026-11-09T21:11:30.420Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2022-42917 (GCVE-0-2022-42917)

Vulnerability from cvelistv5 – Published: 2026-09-13 00:00 – Updated: 2026-09-14 18:15

Summary

In FRRouting FRR before 8.5, the service user (usually frr) can escalate its privileges to root by monitoring the configuration directory (/etc/frr) and replacing config files upon creation with, for example, symlinks to change the ownership of arbitrary files. This is a TOCTOU Race Condition caused by a combination of touch and chown.