ID

VAR-201101-0395

CVE

CVE-2011-0490

TITLE

Tor Service disruption in (DoS) Vulnerabilities

DESCRIPTION

Tor before 0.2.1.29 and 0.2.2.x before 0.2.2.21-alpha makes calls to Libevent within Libevent log handlers, which might allow remote attackers to cause a denial of service (daemon crash) via vectors that trigger certain log messages. Tor is a second generation of onion routing implementation. Versions prior to Tor 0.2.1.29 and versions prior to 0.2.2.21-alpha can be called Libevent in the Libevent Log Processor. Tor is prone to multiple denial-of-service vulnerabilities. Attackers can exploit these issues to crash the affected computer, denying service to legitimate users. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 201110-13 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: High Title: Tor: Multiple vulnerabilities Date: October 18, 2011 Bugs: #351920, #359789 ID: 201110-13 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Multiple vulnerabilities were found in Tor, the most severe of which may allow a remote attacker to execute arbitrary code. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-misc/tor < 0.2.1.30 >= 0.2.1.30 Description =========== Multiple vulnerabilities have been discovered in Tor. Please review the CVE identifiers referenced below for details. Impact ====== A remote unauthenticated attacker may be able to execute arbitrary code with the privileges of the Tor process or create a Denial of Service. Workaround ========== There is no known workaround at this time. Resolution ========== All Tor users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-misc/tor-0.2.1.30" NOTE: This is a legacy GLSA. Updates for all affected architectures are available since April 2, 2011. It is likely that your system is already no longer affected by this issue. References ========== [ 1 ] CVE-2011-0015 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-0015 [ 2 ] CVE-2011-0016 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-0016 [ 3 ] CVE-2011-0427 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-0427 [ 4 ] CVE-2011-0490 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-0490 [ 5 ] CVE-2011-0491 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-0491 [ 6 ] CVE-2011-0492 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-0492 [ 7 ] CVE-2011-0493 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-0493 [ 8 ] CVE-2011-1924 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-1924 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201110-13.xml Concerns? ========= Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org. License ======= Copyright 2011 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. http://creativecommons.org/licenses/by-sa/2.5

IOT TAXONOMY

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

design error

CONFIGURATIONS

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Tor

SOURCES

LAST UPDATE DATE

2025-04-11T23:02:12.133000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE