Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2024-42491

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
05/09/2024
Last modified:
03/11/2025

Description

Asterisk is an open-source private branch exchange (PBX). Prior to versions 18.24.3, 20.9.3, and 21.4.3 of Asterisk and versions 18.9-cert12 and 20.7-cert2 of certified-asterisk, if Asterisk attempts to send a SIP request to a URI whose host portion starts with `.1` or `[.1]`, and res_resolver_unbound is loaded, Asterisk will crash with a SEGV. To receive a patch, users should upgrade to one of the following versions: 18.24.3, 20.9.3, 21.4.3, certified-18.9-cert12, certified-20.7-cert2. Two workarounds are available. Disable res_resolver_unbound by setting `noload = res_resolver_unbound.so` in modules.conf, or set `rewrite_contact = yes` on all PJSIP endpoints. NOTE: This may not be appropriate for all Asterisk configurations.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.70 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H

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

Base Score 3.x
5.70
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:* 18.24.3 (excluding)
cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:* 20.0.0 (including) 20.9.3 (excluding)
cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:* 21.0.0 (including) 21.4.3 (including)
cpe:2.3:a:sangoma:certified_asterisk:*:*:*:*:*:*:*:* 18.9 (excluding)
cpe:2.3:a:sangoma:certified_asterisk:18.9:-:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:18.9:cert1:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:18.9:cert1-rc1:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:18.9:cert10:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:18.9:cert11:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:18.9:cert2:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:18.9:cert3:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:18.9:cert4:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:18.9:cert5:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:18.9:cert6:*:*:*:*:*:*
cpe:2.3:a:sangoma:certified_asterisk:18.9:cert7:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools