GLSA-200904-11 : Tor: Multiple vulnerabilities

This script is Copyright (C) 2009-2016 Tenable Network Security, Inc.

Synopsis :

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

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

Workaround :

There is no known workaround at this time.

See also :

Solution :

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

Risk factor :

Critical / CVSS Base Score : 10.0
CVSS Temporal Score : 8.7
Public Exploit Available : false

Family: Gentoo Local Security Checks

Nessus Plugin ID: 36139 (gentoo_GLSA-200904-11.nasl)

Bugtraq ID: 33399

CVE ID: CVE-2008-5397

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