CVE-2025-57767: Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.15.2, 21.10.2, and 22.5.2, if a SIP request is received with an…

PriorityP342high7.5CVSS 3.1

AVNACLPRNUINSUCNINAH

EPSS

0.38%

29.9th percentile

Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.15.2, 21.10.2, and 22.5.2, if a SIP request is received with an Authorization header that contains a realm that wasn't in a previous 401 response's WWW-Authenticate header, or an Authorization header with an incorrect realm was received without a previous 401 response being sent, the get_authorization_header() function in res_pjsip_authenticator_digest will return a NULL. This wasn't being checked before attempting to get the digest algorithm from the header which causes a SEGV. This issue has been patched in versions 20.15.2, 21.10.2, and 22.5.2. There are no workarounds.

Affected

7 ranges

Vendor	Product	Version range	Fixed in
asterisk	asterisk	< 22.5.2	22.5.2
asterisk	asterisk	< 21.10.2	21.10.2
asterisk	asterisk	< 20.15.2	20.15.2
debian	asterisk	< asterisk 1:22.5.2~dfsg+~cs6.15.60671435-1 (sid)	asterisk 1:22.5.2~dfsg+~cs6.15.60671435-1 (sid)
sangoma	asterisk	< 20.15.2	20.15.2
sangoma	asterisk	>= 21.0.0 < 21.10.2	21.10.2
sangoma	asterisk	>= 22.0.0 < 22.5.2	22.5.2

CVSS provenance

nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

osv7.5HIGH

vendor_debian7.5LOW

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