CVE-2011-2536

N/A Unknown
Published: July 06, 2011 Modified: April 29, 2026
View on NVD

Description

chan_sip.c in the SIP channel driver in Asterisk Open Source 1.4.x before 1.4.41.2, 1.6.2.x before 1.6.2.18.2, and 1.8.x before 1.8.4.4, and Asterisk Business Edition C.3.x before C.3.7.3, disregards the alwaysauthreject option and generates different responses for invalid SIP requests depending on whether the user account exists, which allows remote attackers to enumerate account names via a series of requests.

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References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
http://downloads.asterisk.org/pub/security/AST-2011-011-1.8.diff
Source: cve@mitre.org
Patch
http://downloads.asterisk.org/pub/security/AST-2011-011.html
Source: cve@mitre.org
Vendor Advisory
http://www.securitytracker.com/id?1025734
Source: cve@mitre.org
http://downloads.asterisk.org/pub/security/AST-2011-011-1.8.diff
Source: af854a3a-2127-422b-91ae-364da2661108
Patch
http://downloads.asterisk.org/pub/security/AST-2011-011.html
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
http://www.securitytracker.com/id?1025734
Source: af854a3a-2127-422b-91ae-364da2661108

6 reference(s) from NVD

Quick Stats

CVSS v3 Score
N/A / 10.0
EPSS (Exploit Probability)
1.9%
78th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-200

Affected Vendors

digium

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