CVE-2007-4103

high

Description

The IAX2 channel driver (chan_iax2) in Asterisk Open 1.2.x before 1.2.23, 1.4.x before 1.4.9, and Asterisk Appliance Developer Kit before 0.6.0, when configured to allow unauthenticated calls, allows remote attackers to cause a denial of service (resource exhaustion) via a flood of calls that do not complete a 3-way handshake, which causes an ast_channel to be allocated but not released.

References

https://euvd.enisa.europa.eu/vulnerability/EUVD-2007-4087

http://www.vupen.com/english/advisories/2007/2701

http://www.securitytracker.com/id?1018472

http://www.securityfocus.com/bid/24950

http://www.securityfocus.com/archive/1/475069/100/0/threaded

http://securityreason.com/securityalert/2960

http://security.gentoo.org/glsa/glsa-200802-11.xml

http://secunia.com/advisories/29051

http://secunia.com/advisories/26274

http://osvdb.org/38197

http://ftp.digium.com/pub/asa/ASA-2007-018.pdf

http://bugs.gentoo.org/show_bug.cgi?id=185713

Details

Source: Mitre, NVD

Published: 2007-07-31

Updated: 2026-06-16

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

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

Severity: High

EPSS

EPSS: 0.05943