Secunia Security Advisory - Two vulnerabilities have been reported in Asterisk, which can be exploited by malicious people to cause a DoS (Denial of Service).
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TITLE:
Asterisk Two Denial of Service Vulnerabilities
SECUNIA ADVISORY ID:
SA49303
VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/49303/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=49303
RELEASE DATE:
2012-05-30
DISCUSS ADVISORY:
http://secunia.com/advisories/49303/#comments
AVAILABLE ON SITE AND IN CUSTOMER AREA:
* Last Update
* Popularity
* Comments
* Criticality Level
* Impact
* Where
* Solution Status
* Operating System / Software
* CVE Reference(s)
http://secunia.com/advisories/49303/
ONLY AVAILABLE IN CUSTOMER AREA:
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* Report Reliability
* Secunia PoC
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* Systems Affected
* Approve Distribution
* Remediation Status
* Secunia CVSS Score
* CVSS
https://ca.secunia.com/?page=viewadvisory&vuln_id=49303
ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
* AUTOMATED SCANNING
http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/
DESCRIPTION:
Two vulnerabilities have been reported in Asterisk, which can be
exploited by malicious people to cause a DoS (Denial of Service).
1) An error in IAX2 channel driver within the
"handle_request_update()" function (channels/chan_sip.c) when placing
an established call on hold can be exploited to cause a crash via
specially crafted packets.
Successful exploitation of this vulnerability requires that the
setting mohinterpret=passthrough is set and that the call is placed
on hold without a suggested music-on-hold class name.
2) An error in SCCP (Skinny) channel driver (channels/chan_skinny.c)
when handling termination of a client's connection can be exploited
to cause a crash by closing a connection to the server in certain
call states.
The vulnerabilities are reported in versions 1.8.11-cert prior to
1.8.11-cert2, 1.8.x prior to 1.8.12.1, and 10.x prior to 10.4.1.
SOLUTION:
Update to a fixed version.
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/
PROVIDED AND/OR DISCOVERED BY:
The vendor credits:
1) mgrobecker
2) Christoph Hebeisen
ORIGINAL ADVISORY:
http://downloads.asterisk.org/pub/security/AST-2012-007.html
http://downloads.asterisk.org/pub/security/AST-2012-008.html
OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/
DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/
EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/
EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/
EXPLOIT:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/
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