GLSA-200905-01 : Asterisk: Multiple vulnerabilities

This script is Copyright (C) 2009-2014 Tenable Network Security, Inc.


Synopsis :

The remote Gentoo host is missing one or more security-related
patches.

Description :

The remote host is affected by the vulnerability described in GLSA-200905-01
(Asterisk: Multiple vulnerabilities)

Multiple vulnerabilities have been discovered in the IAX2 channel
driver when performing the 3-way handshake (CVE-2008-1897), when
handling a large number of POKE requests (CVE-2008-3263), when handling
authentication attempts (CVE-2008-5558) and when handling firmware
download (FWDOWNL) requests (CVE-2008-3264). Asterisk does also not
correctly handle SIP INVITE messages that lack a 'From' header
(CVE-2008-2119), and responds differently to a failed login attempt
depending on whether the user account exists (CVE-2008-3903,
CVE-2009-0041).

Impact :

Remote unauthenticated attackers could send specially crafted data to
Asterisk, possibly resulting in a Denial of Service via a daemon crash,
call-number exhaustion, CPU or traffic consumption. Remote
unauthenticated attackers could furthermore enumerate valid usernames
to facilitate brute-force login attempts.

Workaround :

There is no known workaround at this time.

See also :

http://www.gentoo.org/security/en/glsa/glsa-200905-01.xml

Solution :

All Asterisk users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=net-misc/asterisk-1.2.32'

Risk factor :

High / CVSS Base Score : 7.8
(CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C)

Family: Gentoo Local Security Checks

Nessus Plugin ID: 38677 (gentoo_GLSA-200905-01.nasl)

Bugtraq ID:

CVE ID: CVE-2008-1897
CVE-2008-2119
CVE-2008-3263
CVE-2008-3264
CVE-2008-3903
CVE-2008-5558
CVE-2009-0041