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 220.127.116.11
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
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Subject: Asterisk "BYE/Also" Denial of Service Vulnerability
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