GLSA-200904-11 : Tor: 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-200904-11
(Tor: Multiple vulnerabilities)

Theo de Raadt reported that the application does not properly drop
privileges to the primary groups of the user specified via the 'User'
configuration option (CVE-2008-5397).
rovv reported that the 'ClientDNSRejectInternalAddresses' configuration
option is not always enforced (CVE-2008-5398).
Ilja van Sprundel reported a heap-corruption vulnerability that might
be remotely triggerable on some platforms (CVE-2009-0414).
It has been reported that incomplete IPv4 addresses are treated as
valid, violating the specification (CVE-2009-0939).
Three unspecified vulnerabilities have also been reported
(CVE-2009-0936, CVE-2009-0937, CVE-2009-0938).

Impact :

A local attacker could escalate privileges by leveraging unintended
supplementary group memberships of the Tor process. A remote attacker
could exploit these vulnerabilities to cause a heap corruption with
unknown impact and attack vectors, to cause a Denial of Service via CPU
consuption or daemon crash, and to weaken anonymity provided by the
service.

Workaround :

There is no known workaround at this time.

See also :

http://www.gentoo.org/security/en/glsa/glsa-200904-11.xml

Solution :

All Tor users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=net-misc/tor-0.2.0.34'

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: 36139 (gentoo_GLSA-200904-11.nasl)

Bugtraq ID:

CVE ID: CVE-2008-5397
CVE-2008-5398
CVE-2009-0414
CVE-2009-0936
CVE-2009-0937
CVE-2009-0938
CVE-2009-0939