ubuntu-cve-2021-43804
Vulnerability from osv_ubuntu
Published
2021-12-22 18:15
Modified
2026-04-22 07:40
Summary
Details

PJSIP is a free and open source multimedia communication library written in C language implementing standard based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE. In affected versions if the incoming RTCP BYE message contains a reason's length, this declared length is not checked against the actual received packet size, potentially resulting in an out-of-bound read access. This issue affects all users that use PJMEDIA and RTCP. A malicious actor can send a RTCP BYE message with an invalid reason length. Users are advised to upgrade as soon as possible. There are no known workarounds.

Severity
7.3 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
7.3 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libpj2",
            "binary_version": "2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1"
          },
          {
            "binary_name": "libpjlib-util2",
            "binary_version": "2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1"
          },
          {
            "binary_name": "libpjmedia-audiodev2",
            "binary_version": "2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1"
          },
          {
            "binary_name": "libpjmedia-codec2",
            "binary_version": "2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1"
          },
          {
            "binary_name": "libpjmedia-videodev2",
            "binary_version": "2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1"
          },
          {
            "binary_name": "libpjmedia2",
            "binary_version": "2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1"
          },
          {
            "binary_name": "libpjnath2",
            "binary_version": "2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1"
          },
          {
            "binary_name": "libpjsip-simple2",
            "binary_version": "2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1"
          },
          {
            "binary_name": "libpjsip-ua2",
            "binary_version": "2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1"
          },
          {
            "binary_name": "libpjsip2",
            "binary_version": "2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1"
          },
          {
            "binary_name": "libpjsua2",
            "binary_version": "2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "pjproject",
        "purl": "pkg:deb/ubuntu/pjproject@2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.1.0.0.ast20130823-1",
        "2.1.0.0.ast20130823-1+deb8u1build0.16.04.1",
        "2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libpj2",
            "binary_version": "2.7.2~dfsg-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "libpjlib-util2",
            "binary_version": "2.7.2~dfsg-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "libpjmedia-audiodev2",
            "binary_version": "2.7.2~dfsg-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "libpjmedia-codec2",
            "binary_version": "2.7.2~dfsg-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "libpjmedia-videodev2",
            "binary_version": "2.7.2~dfsg-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "libpjmedia2",
            "binary_version": "2.7.2~dfsg-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "libpjnath2",
            "binary_version": "2.7.2~dfsg-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "libpjsip-simple2",
            "binary_version": "2.7.2~dfsg-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "libpjsip-ua2",
            "binary_version": "2.7.2~dfsg-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "libpjsip2",
            "binary_version": "2.7.2~dfsg-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "libpjsua2",
            "binary_version": "2.7.2~dfsg-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "libpjsua2-2v5",
            "binary_version": "2.7.2~dfsg-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "python-pjproject",
            "binary_version": "2.7.2~dfsg-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "pjproject",
        "purl": "pkg:deb/ubuntu/pjproject@2.7.2~dfsg-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.6~dfsg-2",
        "2.7~dfsg-1",
        "2.7.1~dfsg-1",
        "2.7.1~dfsg-1build1",
        "2.7.2~dfsg-1",
        "2.7.2~dfsg-1ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
        "binaries": [
          {
            "binary_name": "ring",
            "binary_version": "20180228.1.503da2b~ds1-1ubuntu0.1~esm1"
          },
          {
            "binary_name": "ring-daemon",
            "binary_version": "20180228.1.503da2b~ds1-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:18.04:LTS",
        "name": "ring",
        "purl": "pkg:deb/ubuntu/ring@20180228.1.503da2b~ds1-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "20180228.1.503da2b~ds1-1ubuntu0.1~esm1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "20170803.2.5fcfe3f~dfsg1-1",
        "20171024.1.eadbdeb~ds1-1",
        "20171129.2.cf5bbff~ds1-1",
        "20171129.2.cf5bbff~ds1-2",
        "20180119.1.9e06f94~ds1-1",
        "20180119.1.9e06f94~ds1-3",
        "20180222.1.7bffde2~ds2-2",
        "20180228.1.503da2b~ds1-1",
        "20180228.1.503da2b~ds1-1build1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "jami",
            "binary_version": "20190215.1.f152c98~ds1-1+deb10u2build0.20.04.1"
          },
          {
            "binary_name": "jami-daemon",
            "binary_version": "20190215.1.f152c98~ds1-1+deb10u2build0.20.04.1"
          },
          {
            "binary_name": "ring",
            "binary_version": "20190215.1.f152c98~ds1-1+deb10u2build0.20.04.1"
          },
          {
            "binary_name": "ring-daemon",
            "binary_version": "20190215.1.f152c98~ds1-1+deb10u2build0.20.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "ring",
        "purl": "pkg:deb/ubuntu/ring@20190215.1.f152c98~ds1-1+deb10u2build0.20.04.1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "20190215.1.f152c98~ds1-1+deb10u2build0.20.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "20190215.1.f152c98~ds1-1",
        "20190215.1.f152c98~ds1-1build1",
        "20190215.1.f152c98~ds1-1build2"
      ]
    }
  ],
  "aliases": [],
  "details": "PJSIP is a free and open source multimedia communication library written in C language implementing standard based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE. In affected versions if the incoming RTCP BYE message contains a reason\u0027s length, this declared length is not checked against the actual received packet size, potentially resulting in an out-of-bound read access. This issue affects all users that use PJMEDIA and RTCP. A malicious actor can send a RTCP BYE message with an invalid reason length. Users are advised to upgrade as soon as possible. There are no known workarounds.",
  "id": "UBUNTU-CVE-2021-43804",
  "modified": "2026-04-22T07:40:11Z",
  "published": "2021-12-22T18:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-43804"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/pjsip/pjproject/security/advisories/GHSA-3qx3-cg72-wrh9"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/pjsip/pjproject/commit/8b621f192cae14456ee0b0ade52ce6c6f258af1e"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6422-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-43804"
    }
  ],
  "related": [
    "USN-6422-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-43804"
  ]
}



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