CVE-2021-37706 (GCVE-0-2021-37706)

Vulnerability from cvelistv5 – Published: 2021-12-22 00:00 – Updated: 2025-11-04 16:09
VLAI
Title
Potential integer underflow upon receiving STUN message in PJSIP
Summary
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.
Severity
7.3 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CWE
  • CWE-191 - Integer Underflow (Wrap or Wraparound)
Assigner
References
Impacted products
Vendor Product Version
pjsip pjproject Affected: <= 2.11.1
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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 STUN entrante contiene un atributo ERROR-CODE, no se comprueba la longitud del encabezado antes de llevar a cabo una operaci\u00f3n de sustracci\u00f3n, resultando en un escenario de desbordamiento de enteros. Este problema afecta a todos los usuarios que usan STUN. Un actor malicioso situado en la red de la v\u00edctima puede falsificar y enviar un mensaje UDP (STUN) especialmente dise\u00f1ado que podr\u00eda ejecutar remotamente c\u00f3digo arbitrario en la m\u00e1quina de la v\u00edctima. 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:H/I:H/A:H\",\"baseScore\":9.8,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":5.9}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:M/Au:N/C:C/I:C/A:C\",\"baseScore\":9.3,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"MEDIUM\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"COMPLETE\",\"integrityImpact\":\"COMPLETE\",\"availabilityImpact\":\"COMPLETE\"},\"baseSeverity\":\"HIGH\",\"exploitabilityScore\":8.6,\"impactScore\":10.0,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-191\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-191\"}]}],\"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:a:asterisk:certified_asterisk:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"16.8.0\",\"matchCriteriaId\":\"02200524-98C1-49E2-8DFE-7BE82E1181E2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:asterisk:certified_asterisk:16.8.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"FC49FD2F-9A64-4F92-9B73-50E37BEB207E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert1:*:*:*:*:*:*\",\"matchCriteriaId\":\"E64BCD44-2298-4710-9CC3-DF82E6A8DF94\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert10:*:*:*:*:*:*\",\"matchCriteriaId\":\"91CCAB0C-C0F8-4619-AAE1-F6F13FF31570\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert11:*:*:*:*:*:*\",\"matchCriteriaId\":\"F2B7CBB3-E037-416B-AD16-9A553D6A4775\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert12:*:*:*:*:*:*\",\"matchCriteriaId\":\"DE7DDFE1-6A06-477A-AB45-D00053CFA7EC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert2:*:*:*:*:*:*\",\"matchCriteriaId\":\"A35C117A-6EFB-42EB-AD2A-EA7866606927\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert3:*:*:*:*:*:*\",\"matchCriteriaId\":\"40003CBE-792F-4875-9E60-6F1CE0BBAA8E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert4:*:*:*:*:*:*\",\"matchCriteriaId\":\"46A7AA7B-13F2-496A-99ED-1CC13234E8CB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert5:*:*:*:*:*:*\",\"matchCriteriaId\":\"147663CB-B48D-4D89-96BF-F92FF96F347F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert6:*:*:*:*:*:*\",\"matchCriteriaId\":\"27DBBC83-930A-4ECE-8C1E-47481D881B0D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert7:*:*:*:*:*:*\",\"matchCriteriaId\":\"B987A13D-A363-4DCE-BBA1-E35E81ACBA60\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert8:*:*:*:*:*:*\",\"matchCriteriaId\":\"01A5B7F9-FAD2-4C0C-937D-CF1086512130\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert9:*:*:*:*:*:*\",\"matchCriteriaId\":\"F60B4271-F987-4932-86EE-45ED099661E1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"16.0.0\",\"versionEndExcluding\":\"16.24.1\",\"matchCriteriaId\":\"DE99C3B4-20EC-4AC8-9A0A-C690E2DBED99\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"18.0.0\",\"versionEndExcluding\":\"18.10.1\",\"matchCriteriaId\":\"C109B569-DE0D-4AE4-A128-239077CCC05F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:sangoma:ast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Party Advisory\",\"VDB Entry\"]},{\"url\":\"http://seclists.org/fulldisclosure/2022/Mar/0\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Mailing List\",\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://github.com/pjsip/pjproject/commit/15663e3f37091069b8c98a7fce680dc04bc8e865\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://github.com/pjsip/pjproject/security/advisories/GHSA-2qpg-f6wf-w984\",\"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\":\"http://packetstormsecurity.com/files/166225/Asterisk-Project-Security-Advisory-AST-2022-004.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"http://seclists.org/fulldisclosure/2022/Mar/0\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\",\"Patch\",\"Third Party Advisory\"]},{\"url\":\"https://github.com/pjsip/pjproject/commit/15663e3f37091069b8c98a7fce680dc04bc8e865\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Third Party 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Advisory\"]},{\"url\":\"https://www.debian.org/security/2022/dsa-5285\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]}]}}"
  }
}


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Tags
Taxonomy of the tags.




Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.