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Asterisk "BYE/Also" Denial of Service Vulnerability
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Secunia Advisory:
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SA28312
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Release Date:
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2008-01-03
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Last Update:
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2008-02-04
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Popularity:
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4,904 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 Appliance Developer Kit 0.x
Asterisk Business Edition 2.x
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| CVE reference: | CVE-2008-0095
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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 within the handling of the "BYE/Also" transfer method and can be exploited to crash the application.
Successful exploitation requires that a dialog has already been established.
The vulnerability is reported in the following versions:
* Asterisk Open Source 1.4.x prior to version 1.4.17
* Asterisk Business Edition C.x.x prior to version C.1.0-beta8
* AsteriskNOW pre-release prior to beta7
* Asterisk Appliance Developer Kit prior to Asterisk 1.4 revision 95946
* s800i (Asterisk Appliance) 1.0.x prior to version 1.0.3.4
Solution:
Asterisk Open Source:
Update to version 1.4.17:
http://downloads.digium.com/pub/telephony/asterisk
Asterisk Business Edition:
Fixed in version C.1.0
AsteriskNOW:
Fixed in Beta7
http://www.asterisknow.org/.
Asterisk Appliance Developer Kit:
Update to Asterisk 1.4 revision 95946.
s800i (Asterisk Appliance):
Update to version 1.0.3.4.
Provided and/or discovered by:
The vendor credits Grey VoIP.
Changelog:
2008-02-04: Added CVE reference.
Original Advisory:
http://downloads.digium.com/pub/security/AST-2008-001.html
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About this Secunia Advisory
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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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