CVE-2007-4103
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.
Key facts
- CVSS score
- 7.5 (v3.1)
- Severity
- HIGH
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Weakness (CWE)
- CWE-772
- EPSS score
- 5.9% (93th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2007-4087)
- Published
- July 31, 2007
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2007-4087 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- digium / asterisk
- digium / asterisk appliance developer kit
References
- http://bugs.gentoo.org/show_bug.cgi?id=185713(Issue Tracking, Patch)
- http://ftp.digium.com/pub/asa/ASA-2007-018.pdf(Broken Link, Patch)
- http://osvdb.org/38197(Broken Link)
- http://secunia.com/advisories/26274(Broken Link, Patch, Vendor Advisory)
- http://secunia.com/advisories/29051(Broken Link)
- http://security.gentoo.org/glsa/glsa-200802-11.xml(Third Party Advisory)
- http://securityreason.com/securityalert/2960(Broken Link)
- http://www.securityfocus.com/archive/1/475069/100/0/threaded(Broken Link, Third Party Advisory, VDB Entry)
- http://www.securityfocus.com/bid/24950(Broken Link, Third Party Advisory, VDB Entry)
- http://www.securitytracker.com/id?1018472(Broken Link, Third Party Advisory, VDB Entry)
- http://www.vupen.com/english/advisories/2007/2701(Broken Link)
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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