{
  "cveId": "CVE-2021-43804",
  "url": "https://patchblox.com/security/cve/CVE-2021-43804",
  "summary": "CVE-2021-43804 is fixed in 5 products on 1 platform, first by DEBIAN-CVE-2021-43804, released December 22, 2021. It is not reported as exploited. Patch Radar priority: High.",
  "title": "ring: PJSIP is a free and open source multimedia communication library written in C language implementing standard based pr...",
  "description": "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.",
  "published": "2021-12-22T10:15:00Z",
  "severity": "high",
  "cvss": 7.3,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
  "epss": 0.02293,
  "epssPercentile": 0.83363,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "asterisk",
      "release": "Debian 14",
      "fixedVersion": "1:18.12.0~dfsg\u002B~cs6.12.40431413-1",
      "fix": "DEBIAN-CVE-2021-43804",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-43804",
      "released": "2021-12-22T18:15:07Z"
    },
    {
      "platform": "linux",
      "product": "jami",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "20190215.1.f152c98~ds1-1\u002Bdeb10u2build0.20.04.1",
      "fix": "jami 20190215.1.f152c98~ds1-1\u002Bdeb10u2build0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-jami-20190215.1.f152c98-ds1-1-deb10u2build0.20.04.1",
      "released": "2023-03-14T10:15:00Z"
    },
    {
      "platform": "linux",
      "product": "jami-daemon",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "20190215.1.f152c98~ds1-1\u002Bdeb10u2build0.20.04.1",
      "fix": "jami-daemon 20190215.1.f152c98~ds1-1\u002Bdeb10u2build0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-jami-daemon-20190215.1.f152c98-ds1-1-deb10u2build0.20.04.1",
      "released": "2023-03-14T10:15:00Z"
    },
    {
      "platform": "linux",
      "product": "ring",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "20230206.0~ds1-1",
      "fix": "DEBIAN-CVE-2021-43804",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-43804",
      "released": "2021-12-22T18:15:07Z"
    },
    {
      "platform": "linux",
      "product": "ring",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "20180228.1.503da2b~ds1-1ubuntu0.1~esm1",
      "fix": "ring 20180228.1.503da2b~ds1-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-ring-20180228.1.503da2b-ds1-1ubuntu0.1-esm1",
      "released": "2023-03-14T10:15:00Z"
    },
    {
      "platform": "linux",
      "product": "ring",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "20190215.1.f152c98~ds1-1\u002Bdeb10u2build0.20.04.1",
      "fix": "ring 20190215.1.f152c98~ds1-1\u002Bdeb10u2build0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-ring-20190215.1.f152c98-ds1-1-deb10u2build0.20.04.1",
      "released": "2023-03-14T10:15:00Z"
    },
    {
      "platform": "linux",
      "product": "ring-daemon",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "20180228.1.503da2b~ds1-1ubuntu0.1~esm1",
      "fix": "ring-daemon 20180228.1.503da2b~ds1-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-ring-daemon-20180228.1.503da2b-ds1-1ubuntu0.1-esm1",
      "released": "2023-03-14T10:15:00Z"
    },
    {
      "platform": "linux",
      "product": "ring-daemon",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "20190215.1.f152c98~ds1-1\u002Bdeb10u2build0.20.04.1",
      "fix": "ring-daemon 20190215.1.f152c98~ds1-1\u002Bdeb10u2build0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-ring-daemon-20190215.1.f152c98-ds1-1-deb10u2build0.20.04.1",
      "released": "2023-03-14T10:15:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}