CVE-2007-4103

7.5 highEPSS 5.9%

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.

Severity

CVSS 3.1

7.5 high

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

EPSS: 5.9% chance of exploitation in the next 30 days; higher than 93% of CVEs (scores of 2026-10-31)
CWE: CWE-772
Published: 2007-07-31
Modified: 2026-06-16
Record from: the NVD, synced 2026-10-19

Affected

digium:asterisk
digium:asterisk_appliance_developer_kit

References

http://bugs.gentoo.org/show_bug.cgi?id=185713
http://ftp.digium.com/pub/asa/ASA-2007-018.pdf
http://osvdb.org/38197
http://secunia.com/advisories/26274
http://secunia.com/advisories/29051

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