CVE-2007-4103

Publication date 31 July 2007

Last updated 17 July 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

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.

Read the notes from the security team

Status

Package Ubuntu Release Status
asterisk 7.10 gutsy
Not affected
7.04 feisty
Not affected
6.10 edgy
Not affected
6.06 LTS dapper
Not affected

Notes

fujitsu

Only 1.2.20, 1.2.21, 1.2.21.1 and 1.2.22 are affected.

Severity score breakdown

Parameter Value
Base score 7.5 · High
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Other references