{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-19T07:33:56.486","vulnerabilities":[{"cve":{"id":"CVE-2021-43804","sourceIdentifier":"security-advisories@github.com","published":"2021-12-22T18:15:07.900","lastModified":"2025-11-04T16:15:45.610","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"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."},{"lang":"es","value":"PJSIP es una biblioteca de comunicación multimedia gratuita y de código abierto escrita en lenguaje C que implementa protocolos basados en estándares como SIP, SDP, RTP, STUN, TURN e ICE. En las versiones afectadas, si el mensaje RTCP BYE entrante contiene la longitud de un motivo, esta longitud declarada no es comprobado con el tamaño real del paquete recibido, resultando potencialmente en un acceso de lectura fuera de límites. Este problema afecta a todos los usuarios que usan PJMEDIA y RTCP. Un actor malicioso puede enviar un mensaje RTCP BYE con una longitud de razón no válida. Se aconseja a usuarios que actualicen lo antes posible. No se presentan soluciones conocidas"}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","baseScore":7.3,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"LOW"},"exploitabilityScore":3.9,"impactScore":3.4},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","baseScore":7.3,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"LOW"},"exploitabilityScore":3.9,"impactScore":3.4}],"cvssMetricV2":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:P/I:P/A:P","baseScore":7.5,"accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","availabilityImpact":"PARTIAL"},"baseSeverity":"HIGH","exploitabilityScore":10.0,"impactScore":6.4,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-125"}]},{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-125"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:teluu:pjsip:*:*:*:*:*:*:*:*","versionEndIncluding":"2.11.1","matchCriteriaId":"6BB0273A-3235-4BC7-A1BE-7D35BABD8617"}]}]},{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*","matchCriteriaId":"DEECE5FC-CACF-4496-A3E7-164736409252"},{"vulnerable":true,"criteria":"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*","matchCriteriaId":"07B237A9-69A3-4A9C-9DA0-4E06BD37AE73"}]}]}],"references":[{"url":"https://github.com/pjsip/pjproject/commit/8b621f192cae14456ee0b0ade52ce6c6f258af1e","source":"security-advisories@github.com","tags":["Patch","Third Party Advisory"]},{"url":"https://github.com/pjsip/pjproject/security/advisories/GHSA-3qx3-cg72-wrh9","source":"security-advisories@github.com","tags":["Patch","Third Party Advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2022/03/msg00035.html","source":"security-advisories@github.com","tags":["Mailing List","Third Party Advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html","source":"security-advisories@github.com","tags":["Mailing List","Third Party Advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2023/08/msg00038.html","source":"security-advisories@github.com"},{"url":"https://security.gentoo.org/glsa/202210-37","source":"security-advisories@github.com","tags":["Third Party Advisory"]},{"url":"https://www.debian.org/security/2022/dsa-5285","source":"security-advisories@github.com","tags":["Third Party Advisory"]},{"url":"https://github.com/pjsip/pjproject/commit/8b621f192cae14456ee0b0ade52ce6c6f258af1e","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Third Party Advisory"]},{"url":"https://github.com/pjsip/pjproject/security/advisories/GHSA-3qx3-cg72-wrh9","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch","Third Party Advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2022/03/msg00035.html","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mailing List","Third Party Advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mailing List","Third Party Advisory"]},{"url":"https://lists.debian.org/debian-lts-announce/2023/08/msg00038.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2024/09/msg00030.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.gentoo.org/glsa/202210-37","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"]},{"url":"https://www.debian.org/security/2022/dsa-5285","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory"]}]}}]}