PT-2011-5003 · Digium · Asterisk Open Source

Ben Williams · Published 2011-12-15 · Updated 2012-11-06 · CVE-2011-4597

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 1.4.42 Asterisk Open Source versions 1.6.x through 1.6.2.20 Asterisk Open Source versions 1.8.x through 1.8.7.1

Description The issue affects the SIP over UDP implementation, allowing remote attackers to enumerate usernames by sending a series of requests. This is possible due to the different port numbers used for responses to invalid requests, depending on whether a SIP username exists.

Recommendations For Asterisk Open Source versions 1.4.x through 1.4.42, update to version 1.4.43 or later. For Asterisk Open Source versions 1.6.x through 1.6.2.20, update to version 1.6.2.21 or later. For Asterisk Open Source versions 1.8.x through 1.8.7.1, update to version 1.8.7.2 or later.

Fix

Information Disclosure

Weakness Enumeration

CWE-200

Related Identifiers

CVE-2011-4597

DSA-2367-1

Affected Products

Asterisk Open Source

References · 13

• https://security-tracker.debian.org/tracker/CVE-2011-4597 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2011-4597 · Vendor Advisory
• http://debian.org/security/2011/dsa-2367 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2011-4597 · Security Note
• https://osv.dev/vulnerability/CVE-2011-4597 · Vendor Advisory
• http://openwall.com/lists/oss-security/2011/12/09/4 · Note
• http://osvdb.org/77597 · Note
• http://secunia.com/advisories/47273 · Note
• http://archives.neohapsis.com/archives/bugtraq/2011-12/0151.html · Note
• http://downloads.asterisk.org/pub/security/AST-2011-013.html · Note
• http://openwall.com/lists/oss-security/2011/12/09/3 · Note
• http://lists.digium.com/pipermail/asterisk-dev/2011-November/052191.html · Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4597 · Note