drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Mehrere Probleme in Tor
Name: |
Mehrere Probleme in Tor |
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ID: |
201201-12 |
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Distribution: |
Gentoo |
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Plattformen: |
Keine Angabe |
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Datum: |
Di, 24. Januar 2012, 08:17 |
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Referenzen: |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-2768
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-2769
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-2778 |
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Applikationen: |
Tor |
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Originalnachricht |
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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 201201-12 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Normal Title: Tor: Multiple vulnerabilities Date: January 23, 2012 Bugs: #388769, #394969 ID: 201201-12
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Synopsis ========
Multiple vulnerabilities have been found in Tor, the most severe of which may allow a remote attacker to execute arbitrary code.
Background ==========
Tor is an implementation of second generation Onion Routing, a connection-oriented anonymizing communication service.
Affected packages =================
------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-misc/tor < 0.2.2.35 >= 0.2.2.35
Description ===========
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.
Resolution ==========
All Tor users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=net-misc/tor-0.2.2.35"
References ==========
[ 1 ] CVE-2011-2768 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-2768 [ 2 ] CVE-2011-2769 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-2769 [ 3 ] CVE-2011-2778 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-2778
Availability ============
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-201201-12.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 2012 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
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