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Asterisk IAX2 Handshake Denial of Service
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Secunia Advisory:
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SA29927
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Release Date:
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2008-04-23
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Last Update:
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2008-04-28
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Critical:
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Less critical
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Impact:
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DoS
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Where:
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From local network
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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-2008-1897 (Secunia mirror)
CVE-2008-1923 (Secunia mirror)
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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 improper verification of ACK responses during IAX2 handshakes, which can be exploited to spoof an IAX2 handshake and cause a DoS via high bandwidth usage.
The vulnerability is reported in the following versions:
* Asterisk Open Source 1.0.x (all versions)
* Asterisk Open Source 1.2.x (all versions prior to 1.2.28)
* Asterisk Open Source 1.4.x (all versions prior to 1.4.19.1)
* Asterisk Business Edition A.x.x (all versions)
* Asterisk Business Edition B.x.x (all versions prior to B.2.5.2)
* Asterisk Business Edition C.x.x (all versions prior to C.1.8.1)
* AsteriskNOW 1.0.x (all versions prior to 1.0.3)
* Asterisk Appliance Developer Kit 0.x.x (all versions)
* s800i (Asterisk Appliance) 1.0.x (all versions prior to 1.1.0.3)
Solution:
Asterisk Open Source 1.2.x:
Fixed in 1.2.28.
Asterisk Open Source 1.4.x:
Fixed in 1.4.19.1.
Asterisk Business Edition B.x.x:
Fixed in B.2.5.2
Asterisk Business Edition C.x.x:
Fixed in C.1.8.1.
AsteriskNOW:
Fixed in 1.0.3.
s800i (Asterisk Appliance):
Fixed in 1.1.0.3.
Provided and/or discovered by:
Joel R. Voss a.k.a. Javantea
Changelog:
2008-04-28: Added CVE reference.
Original Advisory:
Asterisk:
http://downloads.digium.com/pub/security/AST-2008-006.html
AltSci:
https://www.altsci.com/concepts/page.php?s=asteri&p=2
Extended Solution:
The "Extended Solution" section is available for Secunia customers only. Request a trial and get access to the Secunia Customer Area and Extended Secunia advisories.
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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