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Asterisk "pedantic" SIP Processing Denial of Service
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Secunia Advisory:
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SA30517
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Release Date:
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2008-06-04
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Popularity:
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2,231 views
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Critical:
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Moderately critical
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Impact:
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DoS
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| Software: | Asterisk 1.x
Asterisk Business Edition 2.x
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| CVE reference: | CVE-2008-2119
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Description:
A vulnerability has been reported in Asterisk, which can be exploited by malicious people to cause a DoS (Denial of Service).
The vulnerability is caused due to a NULL-pointer dereference error in the "ast_uri_decode()" function. This can be exploited to crash the application via a SIP message lacking a "From" field.
Successful exploitation requires that "pedantic" processing is enabled.
The vulnerability is reported in the following products:
* Asterisk Open Source 1.0.x (all versions)
* Asterisk Open Source 1.2.x (all versions prior to 1.2.29)
* Asterisk Business Edition A.x.x (all versions)
* Asterisk Business Edition B.x.x (all versions prior to B.2.5.3)
Solution:
Asterisk Open Source:
Update to version 1.2.29.
Asterisk Business Edition:
Update to version B.2.5.3.
Provided and/or discovered by:
The vendor credits Hooi Ng.
Original Advisory:
http://downloads.digium.com/pub/security/AST-2008-008.html
http://bugs.digium.com/view.php?id=12607
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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