PT-2009-5982 · Digium+1 · Asterisknow+3

Jan Lieskovsky · Published 2009-11-10 · Updated 2009-12-23 · CVE-2009-3727

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 1.2.x through 1.2.34 Asterisk Open Source versions 1.4.x through 1.4.26.2 Asterisk Open Source versions 1.6.0.x through 1.6.0.16 Asterisk Open Source versions 1.6.1.x through 1.6.1.8 Business Edition A.x.x Business Edition B.x.x through B.2.5.11 Business Edition C.2.x.x through C.2.4.4 Business Edition C.3.x.x through C.3.2.1 AsteriskNOW version 1.5 s800i versions 1.3.x through 1.3.0.4

Description The issue allows remote attackers to enumerate valid usernames via multiple crafted REGISTER messages with inconsistent usernames in the URI in the "To" header and the Digest in the "Authorization" header. This is due to different error messages being generated depending on whether a SIP username is valid.

Recommendations For Asterisk Open Source versions 1.2.x through 1.2.34, update to version 1.2.35 or later. For Asterisk Open Source versions 1.4.x through 1.4.26.2, update to version 1.4.26.3 or later. For Asterisk Open Source versions 1.6.0.x through 1.6.0.16, update to version 1.6.0.17 or later. For Asterisk Open Source versions 1.6.1.x through 1.6.1.8, update to version 1.6.1.9 or later. For Business Edition A.x.x, no specific fix is provided. For Business Edition B.x.x through B.2.5.11, update to version B.2.5.12 or later. For Business Edition C.2.x.x through C.2.4.4, update to version C.2.4.5 or later. For Business Edition C.3.x.x through C.3.2.1, update to version C.3.2.2 or later. For AsteriskNOW version 1.5, no specific fix is provided. For s800i versions 1.3.x through 1.3.0.4, update to version 1.3.0.5 or later.

Fix

Information Disclosure

Weakness Enumeration

CWE-200

Related Identifiers

CVE-2009-3727

DSA-1952-1

Affected Products

Asterisk Open Source

Asterisknow

Business Edition

S800I

References · 17

• http://secunia.com/advisories/37265 · Vendor Advisory
• https://redhat.com/archives/fedora-package-announce/2009-November/msg00838.html · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2009-3727 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2009-3727 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2009-3727 · Vendor Advisory
• http://debian.org/security/2009/dsa-1952 · Vendor Advisory
• https://redhat.com/archives/fedora-package-announce/2009-November/msg00789.html · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2009-3727 · Vendor Advisory
• http://downloads.asterisk.org/pub/security/AST-2009-008.html · Vendor Advisory
• http://securityfocus.com/bid/36924 · Patch
• http://secunia.com/advisories/37677 · Note
• http://secunia.com/advisories/37479 · Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-3727 · Note
• http://osvdb.org/59697 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=533137 · Note