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

High Nessus Plugin ID 74481

New! Vulnerability Priority Rating (VPR)

Tenable calculates a dynamic VPR for every vulnerability. VPR combines vulnerability information with threat intelligence and machine learning algorithms to predict which vulnerabilities are most likely to be exploited in attacks. Read more about what VPR is and how it's different from CVSS.

VPR Score: 7.5

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

Solution

Update the affected tor package.

See Also

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

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

Plugin Details

Severity: High

ID: 74481

File Name: mandriva_MDVSA-2014-123.nasl

Version: 1.7

Type: local

Published: 2014/06/12

Updated: 2021/01/06

Dependencies: 12634

Risk Information

Risk Factor: High

VPR Score: 7.5

CVSS v2.0

Base Score: 9.4

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N

Temporal Vector: CVSS2#E:POC/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:mandriva:linux:tor, cpe:/o:mandriva:business_server:1

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/Mandrake/release, Host/Mandrake/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2014/06/11

Exploitable With

Core Impact

Reference Information

CVE: CVE-2013-7295, CVE-2014-0160

BID: 64651, 66690

MDVSA: 2014:123