GLSA-200706-05 : ClamAV: Multiple Denials of Service

This script is Copyright (C) 2007-2014 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-200706-05
(ClamAV: Multiple Denials of Service)

Several vulnerabilities were discovered in ClamAV by various
researchers:
Victor Stinner (INL) discovered that the OLE2
parser may enter in an infinite loop (CVE-2007-2650).
A
boundary error was also reported by an anonymous researcher in the file
unsp.c, which might lead to a buffer overflow (CVE-2007-3023).
The file unrar.c contains a heap-based buffer overflow via a
modified vm_codesize value from a RAR file (CVE-2007-3123).
The RAR parsing engine can be bypassed via a RAR file with a header
flag value of 10 (CVE-2007-3122).
The cli_gentempstream()
function from clamdscan creates temporary files with insecure
permissions (CVE-2007-3024).

Impact :

A remote attacker could send a specially crafted file to the scanner,
possibly triggering one of the vulnerabilities. The two buffer
overflows are reported to only cause Denial of Service. This would lead
to a Denial of Service by CPU consumption or a crash of the scanner.
The insecure temporary file creation vulnerability could be used by a
local user to access sensitive data.

Workaround :

There is no known workaround at this time.

See also :

http://www.gentoo.org/security/en/glsa/glsa-200706-05.xml

Solution :

All ClamAV users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=app-antivirus/clamav-0.90.3'

Risk factor :

Critical / CVSS Base Score : 10.0
(CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C)

Family: Gentoo Local Security Checks

Nessus Plugin ID: 25534 (gentoo_GLSA-200706-05.nasl)

Bugtraq ID:

CVE ID: CVE-2007-2650
CVE-2007-3023
CVE-2007-3024
CVE-2007-3122
CVE-2007-3123