CVE-2025-57767

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

28/08/2025

Last modified:

20/10/2025

Description

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&#39;t in a previous 401 response&#39;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&#39;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.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

7.50

Severity 3.x

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:sangoma:asterisk::::::::		20.15.2 (excluding)
cpe:2.3:a:sangoma:asterisk::::::::	21.0.0 (including)	21.10.2 (excluding)
cpe:2.3:a:sangoma:asterisk::::::::	22.0.0 (including)	22.5.2 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2025-57767

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools