CVE-2021-37706

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.

CVSS v3.0 9.8 CRITICAL
CVSS v2.0 9.3 HIGH

9.8^/10

CVSS v3.0 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

9.3^/10

CVSS v2.0 : HIGH

V2 Legend

Vector : AV:N/AC:M/Au:N/C:C/I:C/A:C

Exploitability : 8.6 / Impact : 10.0

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://github.com/pjsip/pjproject/security/advisories/GHSA-2qpg-f6wf-w984	Patch Third Party Advisory
https://github.com/pjsip/pjproject/commit/15663e3f37091069b8c98a7fce680dc04bc8e865	Patch Third Party Advisory
http://seclists.org/fulldisclosure/2022/Mar/0	Mailing List Patch Third Party Advisory
http://packetstormsecurity.com/files/166225/Asterisk-Project-Security-Advisory-AST-2022-004.html	Third Party Advisory VDB Entry
https://lists.debian.org/debian-lts-announce/2022/03/msg00035.html	Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202210-37	Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html	Mailing List Third Party Advisory
https://www.debian.org/security/2022/dsa-5285	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:teluu:pjsip:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert12::::::
	cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert11::::::
	cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert10::::::
	cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert9::::::
	cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert8::::::
	cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert7::::::
	cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert6::::::
	cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert5::::::
	cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert4::::::
	cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert3::::::
	cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert2::::::
	cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert1::::::
	cpe:2.3:a:asterisk:certified_asterisk::::::::
	cpe:2.3:a:asterisk:certified_asterisk:16.8.0:::::::*
	cpe:2.3:a:sangoma:asterisk::::::::
	cpe:2.3:a:sangoma:asterisk::::::::
	cpe:2.3:a:sangoma:asterisk::::::::

Configuration 3 (hide)

OR	cpe:2.3:o:debian:debian_linux:9.0:::::::*
	cpe:2.3:o:debian:debian_linux:10.0:::::::*

Information

Published : 2021-12-22 10:15

Updated : 2023-02-02 10:08

NVD link : CVE-2021-37706

Mitre link : CVE-2021-37706

JSON object : View

CWE

CWE-191

Integer Underflow (Wrap or Wraparound)

Products Affected

asterisk

certified_asterisk

teluu

pjsip

debian

debian_linux

sangoma

asterisk

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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\u2019s network may forge and send a specially crafted UDP (STUN) message that could remotely execute arbitrary code on the victim\u2019s machine. Users are advised to upgrade as soon as possible. There are no known workarounds."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-191"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2021-37706", "ASSIGNER": "security-advisories@github.com"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 9.3, "accessVector": "NETWORK", "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C", "authentication": "NONE", "integrityImpact": "COMPLETE", "accessComplexity": "MEDIUM", "availabilityImpact": "COMPLETE", "confidentialityImpact": "COMPLETE"}, "severity": "HIGH", "acInsufInfo": false, "impactScore": 10.0, "obtainAllPrivilege": false, "exploitabilityScore": 8.6, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}}, "publishedDate": "2021-12-22T18:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:teluu:pjsip:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndIncluding": "2.11.1"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert12:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert11:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert10:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert9:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert8:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert7:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert6:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert5:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert4:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert3:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert2:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert1:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:asterisk:certified_asterisk:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "16.8.0"}, {"cpe23Uri": "cpe:2.3:a:asterisk:certified_asterisk:16.8.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "16.24.1", "versionStartIncluding": "16.0.0"}, {"cpe23Uri": "cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "19.2.1", "versionStartIncluding": "19.0.0"}, {"cpe23Uri": "cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "18.10.1", "versionStartIncluding": "18.0.0"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2023-02-02T18:08Z"}

9.8 /10