Detections
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GLSA-201201-12 : Tor: Multiple vulnerabilities
high Nessus Plugin ID 57654
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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-201201-12 (Tor: Multiple vulnerabilities)Multiple vulnerabilities have been discovered in Tor:
When configured as client or bridge, Tor uses the same TLS certificate chain for all outgoing connections (CVE-2011-2768).
When configured as a bridge, Tor relays can distinguish incoming bridge connections from client connections (CVE-2011-2769).
An error in or/buffers.c could result in a heap-based buffer overflow (CVE-2011-2778).
Impact :
A remote attacker could possibly execute arbitrary code or cause a Denial of Service. Furthermore, a remote relay the user is directly connected to may be able to disclose anonymous information about that user or enumerate bridges in the user's connection.
Workaround :
There is no known workaround at this time.
Solution
All Tor users should upgrade to the latest version:# emerge --sync # emerge --ask --oneshot --verbose '>=net-misc/tor-0.2.2.35'
See Also
Plugin Details
Severity: High
ID: 57654
File Name: gentoo_GLSA-201201-12.nasl
Version: 1.9
Type: local
Family: Gentoo Local Security Checks
Published: 1/24/2012
Updated: 1/6/2021
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5.9
CVSS v2
Risk Factor: High
Base Score: 7.6
Temporal Score: 5.6
Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C
Vulnerability Information
CPE: p-cpe:/a:gentoo:linux:tor, cpe:/o:gentoo:linux
Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list
Exploit Ease: No known exploits are available
Patch Publication Date: 1/23/2012
Reference Information
CVE: CVE-2011-2768, CVE-2011-2769, CVE-2011-2778
GLSA: 201201-12