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Asterisk Two Denial of Service Vulnerabilities

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Release Date:  2012-07-06    Last Update:  2012-07-09    Views:  1,293

Secunia Advisory SA49814

Where:

From remote

Impact:

DoS

Solution Status:

Vendor Patch

CVE Reference(s):

Description


Two vulnerabilities have been reported in Asterisk, which can be exploited by malicious users to cause a DoS (Denial of Service).

1) An error when handling a provisional response from an endpoint during a re-invite can be exploited to consume all RTP ports resulting in inability to make further calls.

Successful exploitation of this vulnerability requires an attacker to have the ability to place calls.

2) A double-free error exists when a single voicemail account is manipulated by two callers at the same time and can be exploited to cause a crash.

Please see the vendor's advisory for a list of affected versions.


Solution:
Apply patches (please see the vendor's advisory for details).

Provided and/or discovered by:
The vendor credits:
1) Steve Davies
2) Nicolas Bouliane, Avencall Security Labs

Original Advisory:
http://downloads.asterisk.org/pub/security/AST-2012-010.html
http://downloads.asterisk.org/pub/security/AST-2012-011.html

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Asterisk Two Denial of Service Vulnerabilities

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