Home / vulnerabilities Secunia Security Advisory 47059
Posted on 10 December 2011
Source : packetstormsecurity.org Link
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TITLE:
Asterisk Enumeration Weakness and Denial of Service Vulnerability
SECUNIA ADVISORY ID:
SA47059
VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/47059/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=47059
RELEASE DATE:
2011-12-09
DISCUSS ADVISORY:
http://secunia.com/advisories/47059/#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/47059/
ONLY AVAILABLE IN CUSTOMER AREA:
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* Report Reliability
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* Secunia Analysis
* Systems Affected
* Approve Distribution
* Remediation Status
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* CVSS
https://ca.secunia.com/?page=viewadvisory&vuln_id=47059
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:
A weakness and vulnerability have been reported in Asterisk, which
can be exploited by malicious people to disclose certain system
information and cause a DoS (Denial of Service).
1) The weakness is caused due to Asterisk responding on different
ports for certain requests, which can be exploited to e.g. enumerate
SIP peers.
Successful exploitation requires that SIP endpoints with different
NAT settings are used.
2) The vulnerability is caused due to a NULL pointer dereference
error within the "handle_request_info()" function
(channels/chan_sip.c) when the "automon" feature is enabled (disabled
by default) and can be exploited to cause a crash by sending a
sequence of specially crafted SIP packets.
The weakness is reported in all Asterisk versions and the
vulnerability is reported in versions 1.6.2.x prior to 1.6.2.21 and
1.8.x prior to 1.8.7.2.
SOLUTION:
Update to versions 1.6.2.21 and 1.8.7.2 or apply patches. Follow the
vendor's instructions to prevent exploitation of weakness #1.
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/
PROVIDED AND/OR DISCOVERED BY:
The vendor credits:
1) Ben Williams
2) Kristijan Vrban
ORIGINAL ADVISORY:
Asterisk:
http://downloads.asterisk.org/pub/security/AST-2011-013.html
http://downloads.asterisk.org/pub/security/AST-2011-014.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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