channels/chan_iax2.c in Asterisk Open Source 1.8.x before 1.8.15.1 and 10.x before 10.7.1, Certified Asterisk 1.8.11 before 1.8.11-cert7, A…

published 2012-08-31 14 y ago modified 2026-06-16 4 mo ago also EUVD-2012-4662

cvss: 6.0; version 2.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.5%; EPSS 1.5% chance of exploitation in 30 days, percentile 74%
public exploits: 0; none known

channels/chan_iax2.c in Asterisk Open Source 1.8.x before 1.8.15.1 and 10.x before 10.7.1, Certified Asterisk 1.8.11 before 1.8.11-cert7, Asterisk Digiumphones 10.x.x-digiumphones before 10.7.1-digiumphones, and Asterisk Business Edition C.3.x before C.3.7.6 does not enforce ACL rules during certain uses of peer credentials, which allows remote authenticated users to bypass intended outbound-call restrictions by leveraging the availability of these credentials.

Patch / fix

distros 1

asterisk Debian 14 1:1.8.13.1~dfsg-1

debian advisories DEBIAN-CVE-2012-4737

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2012-4737 updated 2025-11-21 cvss 3.5

Asterisk: ACL rules ignored when placing outbound calls by certain IAX2 users

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.49% chance of exploitation in the next 30 days, higher than 74% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	2.0	6.0	AV:N/AC:M/Au:S/C:P/I:P/A:P

Classification

Weakness

CWE-264 Permissions, Privileges, and Access Controls

References

debian.org /security/2012/dsa-2550
vendor-advisory
downloads.asterisk.org /pub/security/AST-2012-013.html
vendor-advisory
secunia.com /advisories/50687
third-party-advisory
secunia.com /advisories/50756
third-party-advisory
securitytracker.com /id?1027461
vdb-entry
securityfocus.com /bid/55335
vdb-entry

Sources

CVE List CVE-2012-4737
NVD CVE-2012-4737

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary