Mandriva Linux Security Advisory : tor (MDVSA-2014:123)

This script is Copyright (C) 2014-2016 Tenable Network Security, Inc.


Synopsis :

The remote Mandriva Linux host is missing a security update.

Description :

Updated tor packages fix multiple vulnerabilities :

Tor before 0.2.4.20, when OpenSSL 1.x is used in conjunction with a
certain HardwareAccel setting on Intel Sandy Bridge and Ivy Bridge
platforms, does not properly generate random numbers for relay
identity keys and hidden-service identity keys, which might make it
easier for remote attackers to bypass cryptographic protection
mechanisms via unspecified vectors (CVE-2013-7295).

Update to version 0.2.4.22 solves these major and security problems :

- Block authority signing keys that were used on
authorities vulnerable to the heartbleed bug in OpenSSL
(CVE-2014-0160).

- Fix a memory leak that could occur if a microdescriptor
parse fails during the tokenizing step.

- The relay ciphersuite list is now generated
automatically based on uniform criteria, and includes
all OpenSSL ciphersuites with acceptable strength and
forward secrecy.

- Relays now trust themselves to have a better view than
clients of which TLS ciphersuites are better than
others.

- Clients now try to advertise the same list of
ciphersuites as Firefox 28.

For other changes see the upstream change log

See also :

http://advisories.mageia.org/MGASA-2014-0059.html
http://advisories.mageia.org/MGASA-2014-0256.html

Solution :

Update the affected tor package.

Risk factor :

High / CVSS Base Score : 9.4
(CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N)
CVSS Temporal Score : 7.4
(CVSS2#E:POC/RL:OF/RC:C)
Public Exploit Available : true

Family: Mandriva Local Security Checks

Nessus Plugin ID: 74481 ()

Bugtraq ID: 64651
66690

CVE ID: CVE-2013-7295
CVE-2014-0160

Ready to Amp Up Your Nessus Experience?

Get Nessus Professional to scan unlimited IPs, run compliance checks & more

Buy Nessus Professional Now