CVE-2021-46837

res_pjsip_t38 in Sangoma Asterisk 16.x before 16.16.2, 17.x before 17.9.3, and 18.x before 18.2.2, and Certified Asterisk before 16.8-cert7, allows an attacker to trigger a crash by sending an m=image line and zero port in a response to a T.38 re-invite initiated by Asterisk. This is a re-occurrence of the CVE-2019-15297 symptoms but not for exactly the same reason. The crash occurs because there is an append operation relative to the active topology, but this should instead be a replace operation.

CVSS v3.0 6.5 MEDIUM

6.5^/10

CVSS v3.0 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://downloads.asterisk.org/pub/security/AST-2021-006.html	Vendor 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

Advertisement

Configurations

Configuration 1 (hide)

OR	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:digium:asterisk::::::::
	cpe:2.3:a:digium:asterisk::::::::
	cpe:2.3:a:digium:asterisk::::::::
	cpe:2.3:a:asterisk:certified_asterisk:16.8.0:-::::::

Configuration 2 (hide)

OR	cpe:2.3:o:debian:debian_linux:9.0:::::::*
	cpe:2.3:o:debian:debian_linux:10.0:::::::*
	cpe:2.3:o:debian:debian_linux:11.0:::::::*

Information

Published : 2022-08-30 00:15

Updated : 2023-01-27 17:20

NVD link : CVE-2021-46837

Mitre link : CVE-2021-46837

JSON object : View

CWE

CWE-476

NULL Pointer Dereference

Advertisement

Products Affected

asterisk

certified_asterisk

debian

debian_linux

digium

asterisk

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://downloads.asterisk.org/pub/security/AST-2021-006.html", "name": "https://downloads.asterisk.org/pub/security/AST-2021-006.html", "tags": ["Vendor Advisory"], "refsource": "MISC"}, {"url": "https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html", "name": "[debian-lts-announce] 20221117 [SECURITY] [DLA 3194-1] asterisk security update", "tags": ["Mailing List", "Third Party Advisory"], "refsource": "MLIST"}, {"url": "https://www.debian.org/security/2022/dsa-5285", "name": "DSA-5285", "tags": ["Third Party Advisory"], "refsource": "DEBIAN"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "res_pjsip_t38 in Sangoma Asterisk 16.x before 16.16.2, 17.x before 17.9.3, and 18.x before 18.2.2, and Certified Asterisk before 16.8-cert7, allows an attacker to trigger a crash by sending an m=image line and zero port in a response to a T.38 re-invite initiated by Asterisk. This is a re-occurrence of the CVE-2019-15297 symptoms but not for exactly the same reason. The crash occurs because there is an append operation relative to the active topology, but this should instead be a replace operation."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-476"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2021-46837", "ASSIGNER": "cve@mitre.org"}}, "impact": {"baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.8}}, "publishedDate": "2022-08-30T07:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"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:digium:asterisk:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "18.2.2", "versionStartIncluding": "18.0.0"}, {"cpe23Uri": "cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "17.9.3", "versionStartIncluding": "17.0.0"}, {"cpe23Uri": "cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "16.16.2", "versionStartIncluding": "16.0.0"}, {"cpe23Uri": "cpe:2.3:a:asterisk:certified_asterisk:16.8.0:-:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}, {"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}, {"cpe23Uri": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2023-01-28T01:20Z"}