channels/chan_sip.c in Asterisk Open Source 1.8.x before 1.8.13.1 and 10.x before 10.5.2, Asterisk Business Edition C.3.x before C.3.7.5, C…

published 2012-07-09 14 y ago modified 2026-06-16 4 mo ago also EUVD-2012-3810

cvss: 4.0; version 2.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 3.2%; EPSS 3.2% chance of exploitation in 30 days, percentile 88%
public exploits: 0; none known

channels/chan_sip.c in Asterisk Open Source 1.8.x before 1.8.13.1 and 10.x before 10.5.2, Asterisk Business Edition C.3.x before C.3.7.5, Certified Asterisk 1.8.11-certx before 1.8.11-cert4, and Asterisk Digiumphones 10.x.x-digiumphones before 10.5.2-digiumphones does not properly handle a provisional response to a SIP reINVITE request, which allows remote authenticated users to cause a denial of service (RTP port exhaustion) via sessions that lack final responses.

Patch / fix

distros 1 links 1

asterisk Debian 14 1:1.8.13.1~dfsg-1

debian advisories DEBIAN-CVE-2012-3863

downloads.asterisk.org/pub/security/AST-2012-010.html advisory

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-2012-3863 updated 2025-11-21 cvss 3.5

asterisk: Possible resource leak on uncompleted re-invite transactions

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

3.20% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	2.0	4.0	AV:N/AC:L/Au:S/C:N/I:N/A:P

Classification

Weakness

CWE-399 Resource Management Errors

References

downloads.asterisk.org /pub/security/AST-2012-010.html
patch, vendor-advisory
debian.org /security/2012/dsa-2550
vendor-advisory
secunia.com /advisories/50687
third-party-advisory
secunia.com /advisories/50756
third-party-advisory
securityfocus.com /bid/54327
vdb-entry
issues.asterisk.org /jira/browse/ASTERISK-19992

Sources

CVE List CVE-2012-3863
NVD CVE-2012-3863

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