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Asterisk Multiple Vulnerabilities
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Secunia Advisory:
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SA26099
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Release Date:
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2007-07-18
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Popularity:
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7,567 views
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Critical:
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Highly critical
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Impact:
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DoS
System access
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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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Subscribe:
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Instant alerts on relevant vulnerabilities 
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| | CVE reference: | CVE-2007-3762
CVE-2007-3763
CVE-2007-3764
CVE-2007-3765
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Description:
Some vulnerabilities have been reported in Asterisk, which can be exploited by malicious people to cause a DoS (Denial of Service) and potentially compromise a vulnerable system.
1) A boundary error exists in the Asterisk STUN implementation, which can be exploited to cause the application to crash via specially crafted RTP packets.
Successful exploitation requires that the chan_sip, chan_gtalk, chan_jingle, chan_h323, chan_mgcp, or chan_skinny is enabled.
The vulnerability is reported in the following products:
Asterisk Open Source 1.4.x prior to version 1.4.8
AsteriskNOW pre-release prior to version beta7
Asterisk Appliance Developer Kit prior to version 0.5.0
s800i 1.0.x prior to version 1.0.2.
2) A boundary error exists in the Asterisk Skinny channel driver (chan_skinny), which can be exploited to cause the application to crash via packets that contain a size field smaller than the actual size of the packet.
Successful exploitation requires that chan_skinny is enabled.
3) A NULL-pointer dereference error exists in the Asterisk IAX2 channel driver (chan_iax2), which can be exploited to cause a DoS via specially crafted LGRQ and LAGRP frames.
Successful exploitation requires that chan_iax is enabled.
4) A boundary error exists in the Asterisk IAX2 channel driver (chan_iax2) within the handling of RTP frames. This can be exploited to cause a stack-based buffer overflow by sending large data payloads (more than 4096 bytes) in a voice or video frame.
Successful exploitation of this vulnerability allows execution of arbitrary code, but requires that the system is configured to connect channels that use RTP and IAX channels.
Vulnerabilities #2, #3, and #4 are reported in the following products:
Asterisk Open Source 1.0.x
Asterisk Open Source 1.2.x prior to version 1.2.22
Asterisk Open Source 1.4.x prior to version 1.4.8
AsteriskNOW pre-release prior to version beta7
Asterisk Business Edition A.x.x
Asterisk Business Edition B.x.x prior to version B.2.2.1
Asterisk Appliance Developer Kit prior to version 0.5.0
s800i 1.0.x prior to version 1.0.2.
Solution:
Asterisk Open Source 1.2.x:
Update to version 1.2.22.
ftp://ftp.digium.com/pub/telephony/asterisk
Asterisk Open Source 1.4.x:
Update to version 1.4.8.
ftp://ftp.digium.com/pub/telephony/asterisk
AsteriskNOW pre-release:
Update to version beta7.
http://www.asterisknow.org
Asterisk Business Edition B.x.x:
Update to version B.2.2.1.
http://www.digium.com
Asterisk Appliance Developer Kit:
Update to version 0.5.0.
ftp://ftp.digium.com/pub/telephony/aadk
s800i:
Update to version 1.0.2.
Provided and/or discovered by:
The vendor credits:
1) and 2) Will Drewry, Google Security Team
3) Chris Clark and Zane Lackey, iSEC Partners
4) Russel Bryant
Original Advisory:
1) http://ftp.digium.com/pub/asa/ASA-2007-017.pdf
2) http://ftp.digium.com/pub/asa/ASA-2007-016.pdf
3) http://ftp.digium.com/pub/asa/ASA-2007-015.pdf
4) http://ftp.digium.com/pub/asa/ASA-2007-014.pdf
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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.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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