CVE-2021-43804

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2021-43804", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "assignerShortName": "GitHub_M", "dateUpdated": "2025-11-04T16:09:25.648Z", "dateReserved": "2021-11-16T00:00:00.000Z", "datePublished": "2021-12-22T00:00:00.000Z"}, "containers": {"cna": {"title": "Out-of-bounds read when parsing RTCP BYE message in PJSIP", "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2023-08-30T00:06:32.522Z"}, "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."}], "affected": [{"vendor": "pjsip", "product": "pjproject", "versions": [{"version": "<= 2.11.1", "status": "affected"}]}], "references": [{"url": "https://github.com/pjsip/pjproject/security/advisories/GHSA-3qx3-cg72-wrh9"}, {"url": "https://github.com/pjsip/pjproject/commit/8b621f192cae14456ee0b0ade52ce6c6f258af1e"}, {"name": "[debian-lts-announce] 20220328 [SECURITY] [DLA 2962-1] pjproject security update", "tags": ["mailing-list"], "url": "https://lists.debian.org/debian-lts-announce/2022/03/msg00035.html"}, {"name": "GLSA-202210-37", "tags": ["vendor-advisory"], "url": "https://security.gentoo.org/glsa/202210-37"}, {"name": "[debian-lts-announce] 20221117 [SECURITY] [DLA 3194-1] asterisk security update", "tags": ["mailing-list"], "url": "https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html"}, {"name": "DSA-5285", "tags": ["vendor-advisory"], "url": "https://www.debian.org/security/2022/dsa-5285"}, {"name": "[debian-lts-announce] 20230829 [SECURITY] [DLA 3549-1] ring security update", "tags": ["mailing-list"], "url": "https://lists.debian.org/debian-lts-announce/2023/08/msg00038.html"}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW", "baseScore": 7.3, "baseSeverity": "HIGH"}}], "problemTypes": [{"descriptions": [{"type": "CWE", "lang": "en", "description": "CWE-125: Out-of-bounds Read", "cweId": "CWE-125"}]}], "source": {"advisory": "GHSA-3qx3-cg72-wrh9", "discovery": "UNKNOWN"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "https://github.com/pjsip/pjproject/security/advisories/GHSA-3qx3-cg72-wrh9", "tags": ["x_transferred"]}, {"url": "https://github.com/pjsip/pjproject/commit/8b621f192cae14456ee0b0ade52ce6c6f258af1e", "tags": ["x_transferred"]}, {"name": "[debian-lts-announce] 20220328 [SECURITY] [DLA 2962-1] pjproject security update", "tags": ["mailing-list", "x_transferred"], "url": "https://lists.debian.org/debian-lts-announce/2022/03/msg00035.html"}, {"name": "GLSA-202210-37", "tags": ["vendor-advisory", "x_transferred"], "url": "https://security.gentoo.org/glsa/202210-37"}, {"name": "[debian-lts-announce] 20221117 [SECURITY] [DLA 3194-1] asterisk security update", "tags": ["mailing-list", "x_transferred"], "url": "https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html"}, {"name": "DSA-5285", "tags": ["vendor-advisory", "x_transferred"], "url": "https://www.debian.org/security/2022/dsa-5285"}, {"name": "[debian-lts-announce] 20230829 [SECURITY] [DLA 3549-1] ring security update", "tags": ["mailing-list", "x_transferred"], "url": "https://lists.debian.org/debian-lts-announce/2023/08/msg00038.html"}, {"url": "https://lists.debian.org/debian-lts-announce/2024/09/msg00030.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-04T16:09:25.648Z"}}]}}

{}

{"affected": [{"affectedData": [{"product": "pjproject", "vendor": "pjsip", "versions": [{"status": "affected", "version": "<= 2.11.1"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:teluu:pjsip:*:*:*:*:*:*:*:*", "matchCriteriaId": "6BB0273A-3235-4BC7-A1BE-7D35BABD8617", "versionEndIncluding": "2.11.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"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", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "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 comunicaci\u00f3n multimedia gratuita y de c\u00f3digo abierto escrita en lenguaje C que implementa protocolos basados en est\u00e1ndares 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 tama\u00f1o real del paquete recibido, resultando potencialmente en un acceso de lectura fuera de l\u00edmites. 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 raz\u00f3n no v\u00e1lida. Se aconseja a usuarios que actualicen lo antes posible. No se presentan soluciones conocidas"}], "id": "CVE-2021-43804", "lastModified": "2026-06-17T04:11:28.337", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 7.5, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.4, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.3, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.4, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-12-22T18:15:07.900", "references": [{"source": "security-advisories@github.com", "tags": ["Patch", "Third Party Advisory"], "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": ["Mailing List", "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", "url": "https://lists.debian.org/debian-lts-announce/2023/08/msg00038.html"}, {"source": "security-advisories@github.com", "tags": ["Third Party Advisory"], "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": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "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": ["Mailing List", "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", "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", "tags": ["Third Party Advisory"], "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"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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