Security advisory

{
  "id": "5ee0332905e7f03f1b4dcecb3ae7c077f859f525ade2cecfadb1f5358b1cf847",
  "url": "https://osv.dev/vulnerability/CVE-2021-43845",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-43845",
    "summary": "PJSIP is a free and open source multimedia communication library. In version 2.11.1 and prior, if incoming RTCP XR message contain block, the data field is not checked against the received packet size, potentially resulting in an out-of-bound read access. This affects all users that use PJMEDIA and RTCP XR. A malicious actor can send a RTCP XR message with an invalid packet size.",
    "evidence": "osv:CVE-2021-43845",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2021-43845",
      "aliases": [
        "CVE-2021-43845",
        "GHSA-r374-qrwv-86hh"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/pjsip/pjproject",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "513700f74787009241a11eda125284277f7dfc1c"
                },
                {
                  "fixed": "f74c1fc22b760d2a24369aa72c74c4a9ab985859"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:teluu:pjsip:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.11.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "f74c1fc22b760d2a24369aa72c74c4a9ab985859"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.11.1",
            "2.11",
            "2.10"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-43845.json",
            "vanir_signatures": [
              {
                "id": "CVE-2021-43845-1f9c9477",
                "digest": {
                  "threshold": 0.9,
                  "line_hashes": [
                    "4073572344689943911124658718667752297",
                    "209010379036503664911872474770178801417",
                    "171642782584085040410049896457325435756",
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                    "101606692147499361841599617856433669746",
                    "39002042882445297833373814622502506687",
                    "93524811712521803336451275932915612712",
                    "219078617565287023457299214877517836405",
                    "93993527446036329088164087373480765830",
                    "294045389916670558896821548348881358083",
                    "164487798707190644002308488821824218494",
                    "14335266818349053158887545740262944328",
                    "216751028195986996072550307876660182928"
                  ]
                },
                "source": "https://github.com/pjsip/pjproject/commit/f74c1fc22b760d2a24369aa72c74c4a9ab985859",
                "target": {
                  "file": "pjmedia/src/pjmedia/rtcp_xr.c"
                },
                "deprecated": false,
                "signature_type": "Line",
                "signature_version": "v1"
              },
              {
                "id": "CVE-2021-43845-8b7a2b25",
                "digest": {
                  "length": 5582,
                  "function_hash": "163415554810497209360073698107880337313"
                },
                "source": "https://github.com/pjsip/pjproject/commit/f74c1fc22b760d2a24369aa72c74c4a9ab985859",
                "target": {
                  "file": "pjmedia/src/pjmedia/rtcp_xr.c",
                  "function": "pjmedia_rtcp_xr_rx_rtcp_xr"
                },
                "deprecated": false,
                "signature_type": "Function",
                "signature_version": "v1"
              }
            ],
            "vanir_signatures_modified": "2026-10-20T14:32:28Z"
          }
        }
      ],
      "modified": "2026-10-20T14:32:28.514900514Z",
      "provider": "osv",
      "references": [
        "https://lists.debian.org/debian-lts-announce/2023/08/msg00038.html",
        "https://lists.debian.org/debian-lts-announce/2024/09/msg00030.html",
        "https://lists.debian.org/debian-lts-announce/2022/03/msg00035.html",
        "https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html",
        "https://security.gentoo.org/glsa/202210-37",
        "https://www.debian.org/security/2022/dsa-5285",
        "https://github.com/pjsip/pjproject/commit/f74c1fc22b760d2a24369aa72c74c4a9ab985859",
        "https://github.com/pjsip/pjproject/pull/2924",
        "https://github.com/pjsip/pjproject/security/advisories/GHSA-r374-qrwv-86hh"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
              "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
              "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "9.0"
                  },
                  {
                    "last_affected": "9.0"
                  },
                  {
                    "introduced": "10.0"
                  },
                  {
                    "last_affected": "10.0"
                  },
                  {
                    "introduced": "11.0"
                  },
                  {
                    "last_affected": "11.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-43845",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 389708,
  "published_at": "2021-12-27T18:15:07.46+00:00"
}