CVE-2020-28242

published 2020-11-06

CVE-2020-28242: An issue was discovered in Asterisk Open Source 13.x before 13.37.1, 16.x before 16.14.1, 17.x before 17.8.1, and 18.x before 18.0.1 and Certified Asterisk…

Priority P3 35 medium 6.5 CVSS 3.1

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

An issue was discovered in Asterisk Open Source 13.x before 13.37.1, 16.x before 16.14.1, 17.x before 17.8.1, and 18.x before 18.0.1 and Certified Asterisk before 16.8-cert5. If Asterisk is challenged on an outbound INVITE and the nonce is changed in each response, Asterisk will continually send INVITEs in a loop. This causes Asterisk to consume more and more memory since the transaction will never terminate (even if the call is hung up), ultimately leading to a restart or shutdown of Asterisk. Outbound authentication must be configured on the endpoint for this to occur.

Affected

9 ranges

Vendor	Product	Version range	Fixed in
asterisk	certified_asterisk	<= 16.8.0	—
debian	asterisk	< asterisk 1:16.15.0~dfsg-1 (bullseye)	asterisk 1:16.15.0~dfsg-1 (bullseye)
debian	debian_linux	—	—
fedoraproject	fedora	—	—
sangoma	asterisk	>= 0 < 1:16.15.0~dfsg-1	1:16.15.0~dfsg-1
sangoma	asterisk	>= 13.0 < 13.37.1	13.37.1
sangoma	asterisk	>= 16.0 < 16.14.1	16.14.1
sangoma	asterisk	>= 17.0 < 17.8.1	17.8.1
sangoma	asterisk	>= 18.0 < 18.0.1	18.0.1

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

nvd v2.0 4.0 MEDIUM AV:N/AC:L/Au:S/C:N/I:N/A:P

osv 6.5 MEDIUM

vendor_debian 6.5 MEDIUM

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CWE-674