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CVE-2011-4597

This CVE name corresponds to:

Entered	Topic
2011-12-09	asterisk -- Multiple Vulnerabilities

The following information is adapted from the Common Vulnerabilities and Exposures (CVE) project. CVE and the CVE logo are trademarks of The MITRE Corporation. CVE content is Copyright 2005, The MITRE Corporation.

CVE-2011-4597 at cve.mitre.org

Details

Type	Candidate
Name	CVE-2011-4597
Phase	Assigned(20111129)

Description

The SIP over UDP implementation in Asterisk Open Source 1.4.x before 1.4.43, 1.6.x before 1.6.2.21, and 1.8.x before 1.8.7.2 uses different port numbers for responses to invalid requests depending on whether a SIP username exists, which allows remote attackers to enumerate usernames via a series of requests.

References

Source	Reference
BUGTRAQ	20111222 Exploit for Asterisk Security Advisory AST-2011-013
MLIST	[oss-security] 20111209 CVE Request -- Asterisk -- AST-2011-013 and AST-2011-014
MLIST	[oss-security] 20111209 Re: CVE Request -- Asterisk -- AST-2011-013 and AST-2011-014
MLIST	[asterisk-dev] 20111108 Summary: SIP, NAT, security concerns, oh my!
CONFIRM	http://downloads.asterisk.org/pub/security/AST-2011-013.html
DEBIAN	DSA-2367
OSVDB	77597
SECUNIA	47273