PT-2011-3922 · Digium · Asterisk Business Edition+1

Published 2011-07-06 · Updated 2011-09-07 · CVE-2011-2536

Positive Technologies (AI Summary)

CVSS v2.0

5.0

Medium

Base vector

AV:N/AC:L/Au:N/C:P/I:N/A:N

Name of the Vulnerable Software and Affected Versions Asterisk Open Source versions 1.4.x through 1.4.41.1 Asterisk Open Source versions 1.6.2.x through 1.6.2.18.1 Asterisk Open Source versions 1.8.x through 1.8.4.3 Asterisk Business Edition C.3.x through C.3.7.2

Description The issue allows remote attackers to enumerate account names via a series of requests, as the SIP channel driver generates different responses for invalid SIP requests depending on whether the user account exists.

Recommendations For Asterisk Open Source versions 1.4.x through 1.4.41.1, update to version 1.4.41.2 or later. For Asterisk Open Source versions 1.6.2.x through 1.6.2.18.1, update to version 1.6.2.18.2 or later. For Asterisk Open Source versions 1.8.x through 1.8.4.3, update to version 1.8.4.4 or later. For Asterisk Business Edition C.3.x through C.3.7.2, update to version C.3.7.3 or later.

Fix

Information Disclosure

Weakness Enumeration

CWE-200

Related Identifiers

CVE-2011-2536

DSA-2276-1

DSA-2276-2

Affected Products

Asterisk Business Edition

Asterisk Open Source

References · 8

• https://security-tracker.debian.org/tracker/CVE-2011-2536 · Vendor Advisory
• http://downloads.asterisk.org/pub/security/AST-2011-011.html · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2011-2536 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2011-2536 · Security Note
• http://downloads.asterisk.org/pub/security/AST-2011-011-1.8.diff · Patch
• https://osv.dev/vulnerability/CVE-2011-2536 · Vendor Advisory
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-2536 · Note
• http://securitytracker.com/id?1025734 · Note