CVE-2021-46837

published 2022-08-30

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…

Priority P3 36 medium 6.5 CVSS 3.1

AV N AC L PR L UI N S U C N I N A H

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.

Affected

9 ranges

Vendor	Product	Version range	Fixed in
asterisk	certified_asterisk	—	—
debian	asterisk	< asterisk 1:16.28.0~dfsg-0+deb11u1 (bullseye)	asterisk 1:16.28.0~dfsg-0+deb11u1 (bullseye)
debian	debian_linux	—	—
debian	debian_linux	—	—
debian	debian_linux	—	—
digium	asterisk	>= 0 < 1:16.28.0~dfsg-0+deb11u1	1:16.28.0~dfsg-0+deb11u1
digium	asterisk	>= 16.0.0 < 16.16.2	16.16.2
digium	asterisk	>= 17.0.0 < 17.9.3	17.9.3
digium	asterisk	>= 18.0.0 < 18.2.2	18.2.2

CVSS provenance

nvd v3.1 6.5 MEDIUM CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

osv 6.5 MEDIUM

vendor_debian 6.5 MEDIUM

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