{"id":"CVE-2021-43845","aliases":["ALPINE-CVE-2021-43845","DEBIAN-CVE-2021-43845","DLA-2962-1","DLA-3194-1","DLA-3549-1","DLA-3887-1","DSA-5285-1","EUVD-2021-30716","GHSA-r374-qrwv-86hh","UBUNTU-CVE-2021-43845","USN-6422-1"],"status":"published","title":"Prevent out-of-bounds read in PJSIP","description":"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.","severity":{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.03893,"percentile":0.90326,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-125"],"published":"2021-12-27T00:00:00Z","modified":"2026-10-23T18:04:16Z","fixes":[{"ecosystem":"Alpine:v3.16","package":"pjproject","fixed_in":["2.12-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"pjproject","fixed_in":["2.12-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"pjproject","fixed_in":["2.12-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"pjproject","fixed_in":["2.12-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"pjproject","fixed_in":["2.12-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"pjproject","fixed_in":["2.12-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"pjproject","fixed_in":["2.12-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"pjproject","fixed_in":["2.12-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"pjproject","fixed_in":["2.12-r0"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"asterisk","fixed_in":["1:18.12.0~dfsg+~cs6.12.40431413-1"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"ring","fixed_in":["20230206.0~ds1-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:18.04:LTS","package":"ring","fixed_in":["20180228.1.503da2b~ds1-1ubuntu0.1~esm1"],"sources":["osv"]},{"ecosystem":"Ubuntu:20.04:LTS","package":"ring","fixed_in":["20190215.1.f152c98~ds1-1+deb10u2build0.20.04.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.16","package":"pjproject","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.17","package":"pjproject","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.18","package":"pjproject","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.19","package":"pjproject","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.20","package":"pjproject","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.21","package":"pjproject","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.22","package":"pjproject","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.23","package":"pjproject","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.24","package":"pjproject","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.12-r0"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"asterisk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:18.12.0~dfsg+~cs6.12.40431413-1"}]}],"versions":["0.1.11-3","0.1.11-3woody1","1:1.0.5-2","1:1.0.5-4","1:1.0.6-1","1:1.0.6-2","1:1.0.7-1","1:1.0.7.dfsg.1-1","1:1.0.7.dfsg.1-2","1:1.0.7.dfsg.1-2sarge1","1:1.0.7.dfsg.1-2sarge2","1:1.0.7.dfsg.1-2sarge3","1:1.0.7.dfsg.1-2sarge4","1:1.0.7.dfsg.1-2sarge5","1:1.0.7.dfsg.1-2sarge6","1:1.0.9.dfsg-1","1:1.0.9.dfsg-3","1:1.0.9.dfsg-4","1:1.0.9.dfsg-5","1:1.0.9.dfsg-6","1:1.2.0-beta1.dfsg-1","1:1.2.0-beta2.dfsg-1","1:1.2.0-beta2.dfsg-2","1:1.2.0-beta2.dfsg-3","1:1.2.0-rc1.dfsg-1","1:1.2.0-rc2.dfsg-1","1:1.2.0.dfsg-1","1:1.2.0.dfsg-2","1:1.2.0.dfsg-3","1:1.2.0.dfsg-4","1:1.2.0.dfsg-5","1:1.2.0.dfsg-6","1:1.2.1.dfsg-1","1:1.2.1.dfsg-2","1:1.2.1.dfsg-3","1:1.2.10.dfsg-1","1:1.2.10.dfsg-1bpo1","1:1.2.10.dfsg-2","1:1.2.10.dfsg-3","1:1.2.11.dfsg-1","1:1.2.12.1.dfsg-1","1:1.2.13~dfsg-1","1:1.2.13~dfsg-2","1:1.2.13~dfsg-2etch1","1:1.2.13~dfsg-2etch2","1:1.2.13~dfsg-2etch3","1:1.2.13~dfsg-2etch4","1:1.2.14~dfsg-1","1:1.2.14~dfsg-2","1:1.2.14~dfsg-3","1:1.2.14~dfsg-4","1:1.2.15~dfsg-1","1:1.2.16~dfsg-1","1:1.2.17~dfsg-1","1:1.2.4.dfsg-1","1:1.2.4.dfsg-2","1:1.2.4.dfsg-3","1:1.2.4.dfsg-4","1:1.2.4.dfsg-5","1:1.2.4.dfsg-6","1:1.2.4.dfsg-6+b1","1:1.2.4.dfsg-7","1:1.2.7.1.dfsg-1","1:1.2.7.1.dfsg-2","1:1.2.7.1.dfsg-3","1:1.2.9.1.dfsg-1","1:1.4.10~dfsg-1","1:1.4.11~dfsg-1","1:1.4.11~dfsg-2","1:1.4.11~dfsg-3","1:1.4.11~dfsg-4","1:1.4.13~dfsg-1","1:1.4.15~dfsg-1","1:1.4.16.2~dfsg-1","1:1.4.16.2~dfsg-2","1:1.4.17~dfsg-1","1:1.4.17~dfsg-2","1:1.4.18.1~dfsg-1","1:1.4.18~dfsg-1","1:1.4.19.1~dfsg-1","1:1.4.20~dfsg-1","1:1.4.21.1~dfsg-1","1:1.4.21.2~dfsg-1","1:1.4.21.2~dfsg-2","1:1.4.21.2~dfsg-3","1:1.4.21.2~dfsg-3+lenny1","1:1.4.21.2~dfsg-3+lenny2","1:1.4.21.2~dfsg-3+lenny2.1","1:1.4.21.2~dfsg-3+lenny3","1:1.4.21.2~dfsg-3+lenny5","1:1.4.21.2~dfsg-3+lenny6","1:1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Party Advisory","fix","report"]},{"url":"https://github.com/pjsip/pjproject/pull/2924","tags":["x_transferred","Exploit","Issue Tracking","Patch","Third Party Advisory","fix","report"]},{"url":"https://github.com/pjsip/pjproject/commit/f74c1fc22b760d2a24369aa72c74c4a9ab985859","tags":["x_transferred","Patch","Third Party Advisory","fix","report"]},{"url":"https://lists.debian.org/debian-lts-announce/2022/03/msg00035.html","tags":["mailing-list","x_transferred","Mailing List","Third Party Advisory","advisory"]},{"url":"https://security.gentoo.org/glsa/202210-37","tags":["vendor-advisory","x_transferred","Third Party Advisory","advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html","tags":["mailing-list","x_transferred","Mailing List","Third Party Advisory","advisory"]},{"url":"https://www.debian.org/security/2022/dsa-5285","tags":["vendor-advisory","x_transferred","Third Party Advisory","advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2023/08/msg00038.html","tags":["mailing-list","x_transferred","web"]},{"url":"https://lists.debian.org/debian-lts-announce/2024/09/msg00030.html","tags":["web"]},{"url":"https://security.alpinelinux.org/vuln/CVE-2021-43845","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-43845","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-43845","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-6422-1","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-43845","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-37706","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-43299","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-43300","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-43301","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-43302","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-43303","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-43804","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2022-21722","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2022-21723","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2022-23537","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2022-23547","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2022-23608","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2022-24754","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2022-24763","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2022-24764","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2022-24793","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2022-31031","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2022-39244","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2023-27585","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-43845","title":"Prevent out-of-bounds read in PJSIP","description":"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.","status":"published","published":"2021-12-27T00:00:00Z","modified":"2025-11-04T16:09:26.963Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L","level":"high","assessor":"cna"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:32:57.033395Z"}],"euvd":[{"id":"EUVD-2021-30716","description":"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.","status":"published","published":"2021-12-27T00:00:00Z","modified":"2025-11-04T16:09:26Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L","level":"high"}],"updated_at":"2026-11-02T19:49:29.391161Z"}],"nvd":[{"id":"CVE-2021-43845","description":"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.","status":"published","published":"2021-12-27T18:15:07.46Z","modified":"2026-06-17T04:11:33.537Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L","level":"high","assessor":"secondary"},{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":6.4,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:07:02.977492Z"}],"osv":[{"id":"ALPINE-CVE-2021-43845","description":"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.","status":"published","published":"2021-12-27T18:15:07.46Z","modified":"2026-10-23T17:17:56.224511972Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"updated_at":"2026-11-02T15:27:48.646074Z"},{"id":"CVE-2021-43845","description":"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.","status":"published","published":"2021-12-27T18:15:07.46Z","modified":"2026-10-20T14:32:28.514900514Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:21.877444Z"},{"id":"DEBIAN-CVE-2021-43845","description":"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.","status":"published","published":"2021-12-27T18:15:07.46Z","modified":"2026-10-23T18:04:16.565427265Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"updated_at":"2026-11-02T15:45:35.799676Z"},{"id":"UBUNTU-CVE-2021-43845","description":"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.","status":"published","published":"2021-12-27T18:15:00Z","modified":"2026-10-17T12:56:01.358026378Z","cvss":[{"version":"3.1","score":8.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L","level":"high"},{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"updated_at":"2026-11-02T15:54:29.220315Z"},{"id":"DLA-2962-1","title":"pjproject - security update","status":"published","published":"2022-03-28T00:00:00Z","modified":"2026-03-09T01:22:05.666031Z","updated_at":"2026-11-02T15:46:11.189256Z"},{"id":"DLA-3194-1","title":"asterisk - security update","status":"published","published":"2022-11-17T00:00:00Z","modified":"2026-03-09T01:21:37.915359Z","updated_at":"2026-11-02T15:46:11.734021Z"},{"id":"DLA-3549-1","title":"ring - security update","status":"published","published":"2023-08-29T00:00:00Z","modified":"2026-03-09T01:19:27.113198Z","updated_at":"2026-11-02T15:46:11.734021Z"},{"id":"DLA-3887-1","title":"ring - security update","status":"published","published":"2024-09-14T00:00:00Z","modified":"2026-03-09T01:22:59.027543Z","updated_at":"2026-11-02T15:46:12.203458Z"},{"id":"DSA-5285-1","title":"asterisk - security update","status":"published","published":"2022-11-17T00:00:00Z","modified":"2026-03-09T02:08:39.330243Z","updated_at":"2026-11-02T15:46:17.543497Z"},{"id":"USN-6422-1","title":"ring vulnerabilities","description":"\nIt was discovered that Ring incorrectly handled certain inputs. If a user or\nan automated system were tricked into opening a specially crafted input file,\na remote attacker could possibly use this issue to execute arbitrary code.\n(CVE-2021-37706)\n\nIt was discovered that Ring incorrectly handled certain inputs. If a user or\nan automated system were tricked into opening a specially crafted input file,\na remote attacker could possibly use this issue to cause a denial of service.\nThis issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. \n(CVE-2021-43299, CVE-2021-43300, CVE-2021-43301, CVE-2021-43302, \nCVE-2021-43303, CVE-2021-43804, CVE-2021-43845, CVE-2022-21723, \nCVE-2022-23537, CVE-2022-23547, CVE-2022-23608, CVE-2022-24754,\nCVE-2022-24763, CVE-2022-24764, CVE-2022-24793, CVE-2022-31031,\nCVE-2022-39244)\n\nIt was discovered that Ring incorrectly handled certain inputs. If a user or\nan automated system were tricked into opening a specially crafted input file,\na remote attacker could possibly use this issue to cause a denial of service.\nThis issue only affected Ubuntu 20.04 LTS. (CVE-2022-21722)\n\nIt was discovered that Ring incorrectly handled certain inputs. If a user or\nan automated system were tricked into opening a specially crafted input file,\na remote attacker could possibly use this issue to cause a denial of service.\n(CVE-2023-27585)\n","status":"published","published":"2023-10-09T15:09:52Z","modified":"2026-04-27T17:02:16.871002419Z","updated_at":"2026-11-02T16:58:17.305935Z"}]}}