Executive Summary

Informations
Name CVE-2011-2536 First vendor Publication 2011-07-06
Vendor Cve Last vendor Modification 2011-09-07

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:P/I:N/A:N)
Cvss Base Score 5 Attack Range Network
Cvss Impact Score 2.9 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

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.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-2536

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-200 Information Exposure

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 198

OpenVAS Exploits

Date Description
2012-02-12 Name : Gentoo Security Advisory GLSA 201110-21 (Asterisk)
File : nvt/glsa_201110_21.nasl
2011-08-03 Name : FreeBSD Ports: asterisk14
File : nvt/freebsd_asterisk142.nasl

Open Source Vulnerability Database (OSVDB)

Id Description
73257 Asterisk SIP Multiple Message Response Username Enumeration

Nessus® Vulnerability Scanner

Date Description
2011-11-22 Name : A telephony application running on the remote host is affected by an informat...
File : asterisk_ast_2011_011.nasl - Type : ACT_GATHER_INFO
2011-10-25 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201110-21.nasl - Type : ACT_GATHER_INFO
2011-06-27 Name : The remote FreeBSD host is missing one or more security-related updates.
File : freebsd_pkg_40544e8c9f7b11e09bec6c626dd55a41.nasl - Type : ACT_GATHER_INFO

Sources (Detail)

Source Url
CONFIRM http://downloads.asterisk.org/pub/security/AST-2011-011-1.8.diff
http://downloads.asterisk.org/pub/security/AST-2011-011.html
SECTRACK http://www.securitytracker.com/id?1025734

Alert History

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Date Informations
2021-05-04 12:14:44
  • Multiple Updates
2021-04-22 01:16:03
  • Multiple Updates
2020-05-23 00:28:57
  • Multiple Updates
2016-04-26 20:52:04
  • Multiple Updates
2014-02-17 11:03:23
  • Multiple Updates
2013-05-10 23:03:19
  • Multiple Updates