FrSIRT - Asterisk Products IAX2 Channel Driver Remote Denial of Service Vulnerability / Exploit (Security Advisories)

French Security Incident Response Team

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Asterisk Products IAX2 Channel Driver Remote Denial of Service Vulnerability

Title : Asterisk Products IAX2 Channel Driver Remote Denial of Service Vulnerability
Advisory ID : FrSIRT/ADV-2007-2701
CVE ID : CVE-2007-4103
Rated as : Low Risk

Remotely Exploitable : Yes
Locally Exploitable : Yes
Release Date : 2007-07-30

Advisory Details

Description

Affected Products

Solution

References

Technical Description

A vulnerability has been identified in various Asterisk products, which could be exploited by attackers to cause a denial of service. This issue is caused by an error in the IAX2 channel driver (chan_iax2) when processing multiple NEW packets for valid extensions, which could be exploited by remote unauthenticated attackers to exhaust all available memory resources, creating a denial of service condition.

Credits

Vulnerability reported by Russell Bryant.

ChangeLog

2007-07-30 : Initial release

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