{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"state":"PUBLISHED","cveId":"CVE-2021-37706","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","assignerShortName":"GitHub_M","dateUpdated":"2025-11-04T16:09:17.025Z","dateReserved":"2021-07-29T00:00:00.000Z","datePublished":"2021-12-22T00:00:00.000Z"},"containers":{"cna":{"title":"Potential integer underflow upon receiving STUN message in PJSIP","providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2023-08-30T00:06:40.686Z"},"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 STUN message contains an ERROR-CODE attribute, the header length is not checked before performing a subtraction operation, potentially resulting in an integer underflow scenario. This issue affects all users that use STUN. A malicious actor located within the victim’s network may forge and send a specially crafted UDP (STUN) message that could remotely execute arbitrary code on the victim’s machine. 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-2qpg-f6wf-w984"},{"url":"https://github.com/pjsip/pjproject/commit/15663e3f37091069b8c98a7fce680dc04bc8e865"},{"name":"20220304 AST-2022-004: pjproject: integer underflow on STUN message","tags":["mailing-list"],"url":"http://seclists.org/fulldisclosure/2022/Mar/0"},{"url":"http://packetstormsecurity.com/files/166225/Asterisk-Project-Security-Advisory-AST-2022-004.html"},{"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-191: Integer Underflow (Wrap or Wraparound)","cweId":"CWE-191"}]}],"source":{"advisory":"GHSA-2qpg-f6wf-w984","discovery":"UNKNOWN"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://github.com/pjsip/pjproject/security/advisories/GHSA-2qpg-f6wf-w984","tags":["x_transferred"]},{"url":"https://github.com/pjsip/pjproject/commit/15663e3f37091069b8c98a7fce680dc04bc8e865","tags":["x_transferred"]},{"name":"20220304 AST-2022-004: pjproject: integer underflow on STUN message","tags":["mailing-list","x_transferred"],"url":"http://seclists.org/fulldisclosure/2022/Mar/0"},{"url":"http://packetstormsecurity.com/files/166225/Asterisk-Project-Security-Advisory-AST-2022-004.html","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":"2025-11-04T16:09:17.025Z"}}]}}