Asterisk IAX2 Channel Driver Resource Consumption Bug Lets Remote Users Deny Service
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SecurityTracker Alert ID: 1018472
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SecurityTracker URL: http://securitytracker.com/id?1018472
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CVE Reference: CVE-2007-4103
(Links to External Site)
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Updated: Apr 25 2008
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Original Entry Date: Jul 30 2007
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Impact: Denial of service via network
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Fix Available: Yes
Vendor Confirmed: Yes
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Version(s): prior to 1.2.23 and 1.4.9
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Description: A vulnerability was reported in Asterisk. A remote user can cause denial of service conditions.
When configured to allow unauthenticated calls, a remote user can send a flood of NEW packets to initiate calls and cause the system
to allocate resources and never deallocate them. This can cause a system to become unusable within a few seconds.
A restart
is required to return to normal operations.
If the guest account or any other account that does not have a password is enabled,
the system may be affected.
Russell Bryant reported this vulnerability.
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Impact: A remote user can cause the system to become unusable.
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Solution: The vendor has issued fixed versions for the various editions of Asterisk.
The Asterisk advisory is available at:
http://ftp.digium.com/pub/asa/ASA-2007-018.pdf
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Vendor URL: ftp.digium.com/pub/asa/ASA-2007-018.pdf (Links to External Site)
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Cause: Resource error
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Underlying OS: Linux (Any), UNIX (Any)
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Message History:
None.
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Source Message Contents
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Date: Sun, 29 Jul 2007 21:55:47 -0400
Subject: Asterisk Project Security Advisory - ASA-2007-018
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http://ftp.digium.com/pub/asa/ASA-2007-018.pdf
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