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Moderately critical

Asterisk Multiple Vulnerabilities

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Release Date:  2012-04-24    Views:  1,705

Secunia Advisory SA48891

Where:

From remote

Impact:

Security Bypass, DoS, System access

Solution Status:

Vendor Patch

CVE Reference(s):

Description


Multiple vulnerabilities have been reported in Asterisk and Asterisk Business Edition, which can be exploited by malicious users to cause a DoS (Denial of Service), bypass certain security restrictions, and compromise a vulnerable system.

1) An error within the Asterisk Manager Interface when handling "originate" actions in the MixMonitor application or the "GetVar" or "Status" manager actions with the "SHELL" and "EVAL" functions does not properly restrict access and can be exploited to execute arbitrary shell commands.

This vulnerability is reported in Asterisk versions 1.6.2.x prior to 1.6.2.24, 1.8.x prior to 1.8.11.1, and 10.x prior to 10.3.1 and Asterisk Business Edition versions 3.x prior to 3.7.4.

2) A boundary error within the Skinny channel driver when handling KEYPAD_BUTTON_MESSAGE events can be exploited to cause a heap-based buffer overflow via specially crafted KEYPAD_BUTTON_MESSAGE events.

Successful exploitation of this vulnerability may allow execution of code.

This vulnerability is reported in Asterisk versions 1.6.2.x prior to 1.6.2.24, 1.8.x prior to 1.8.11.1, and 10.x prior to 10.3.1.

3) An error within the SIP channel driver can be exploited to cause a crash via specially crafted SIP UPDATE requests.

Successful exploitation of this vulnerability requires that the "trustrpid" setting is set to "True".

This vulnerability is reported in Asterisk versions 1.8.x prior to 1.8.11.1 and 10.x prior to 10.3.1 and Asterisk Business Edition versions 3.x prior to 3.7.4.


Solution:
Update to a fixed version.

Further details available to Secunia VIM customers

Provided and/or discovered by:
The vendor credits:
1) David Woolley.
2) Russell Bryant.
3) Thomas Arimont.

Original Advisory:
http://downloads.asterisk.org/pub/security/AST-2012-004.html
http://downloads.asterisk.org/pub/security/AST-2012-005.html
http://downloads.asterisk.org/pub/security/AST-2012-006.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 Multiple Vulnerabilities

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