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Asterisk SCCP Integer Overflow and SIP Denial of Service Vulnerabilities
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Secunia Advisory:
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SA22480
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Release Date:
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2006-10-20
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Last Update:
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2006-10-31
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Popularity:
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9,447 views
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Critical:
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Moderately 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
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Subscribe:
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Instant alerts on relevant vulnerabilities 
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| | CVE reference: | CVE-2006-5444
CVE-2006-5445
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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) An integer overflow exists within the "get_input()" function in chan_skinny.c. This can be exploited to cause a heap-based buffer overflow by sending specially crafted packets to the Asterisk Skinny channel driver.
Successful exploitation may allow the execution of arbitrary code, but requires that "chan_skinny" is loaded.
2) Various unspecified errors within the handling of malformed SIP packets can be exploited to e.g. shut Asterisk down, open channels, fill up queues, log files, and the space for voicemail messages by sending specially crafted SIP packets.
The vulnerabilities are reported in Asterisk 1.0.x prior to 1.0.12 and in the 1.2.x branch prior to 1.2.13. Other versions may also be affected.
Solution:
Update to version 1.0.12 or 1.2.13.
Provided and/or discovered by:
1) Adam Boileau, Security-Assessment.com.
2) Jesus Oquendo
Changelog:
2006-10-24: Added link to US-CERT.
2006-10-26: Added CVE reference.
2006-10-30: Added additional information provided by Jesus Oquendo, added CVE reference.
Original Advisory:
http://lists.grok.org.uk/pipermail/full-disclosure/2006-October/050171.html
http://lists.grok.org.uk/pipermail/full-disclosure/2006-October/050434.html
Other References:
US-CERT VU#521252:
http://www.kb.cert.org/vuls/id/521252
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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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10th Oct, 2008
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