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Gentoo Linux Security Advisory GLSA 200904-11 |
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http://security.gentoo.org/ |
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Severity: High |
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Title: Tor: Multiple vulnerabilities |
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Date: April 08, 2009 |
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Bugs: #250018, #256078, #258833 |
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ID: 200904-11 |
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Synopsis |
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======== |
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|
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Multiple vulnerabilities in Tor might allow for heap corruption, Denial |
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of Service, escalation of privileges and information disclosure. |
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Background |
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========== |
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|
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Tor is an implementation of second generation Onion Routing, a |
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connection-oriented anonymizing communication service. |
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|
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Affected packages |
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================= |
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|
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------------------------------------------------------------------- |
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Package / Vulnerable / Unaffected |
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------------------------------------------------------------------- |
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1 net-misc/tor < 0.2.0.34 >= 0.2.0.34 |
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|
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Description |
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=========== |
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|
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* Theo de Raadt reported that the application does not properly drop |
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privileges to the primary groups of the user specified via the "User" |
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configuration option (CVE-2008-5397). |
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|
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* rovv reported that the "ClientDNSRejectInternalAddresses" |
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configuration option is not always enforced (CVE-2008-5398). |
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* Ilja van Sprundel reported a heap-corruption vulnerability that |
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might be remotely triggerable on some platforms (CVE-2009-0414). |
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|
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* It has been reported that incomplete IPv4 addresses are treated as |
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valid, violating the specification (CVE-2009-0939). |
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|
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* Three unspecified vulnerabilities have also been reported |
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(CVE-2009-0936, CVE-2009-0937, CVE-2009-0938). |
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|
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Impact |
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====== |
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|
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A local attacker could escalate privileges by leveraging unintended |
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supplementary group memberships of the Tor process. A remote attacker |
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could exploit these vulnerabilities to cause a heap corruption with |
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unknown impact and attack vectors, to cause a Denial of Service via CPU |
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consuption or daemon crash, and to weaken anonymity provided by the |
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service. |
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|
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Workaround |
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========== |
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There is no known workaround at this time. |
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Resolution |
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========== |
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All Tor users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=net-misc/tor-0.2.0.34" |
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References |
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========== |
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[ 1 ] CVE-2008-5397 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5397 |
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[ 2 ] CVE-2008-5398 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5398 |
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[ 3 ] CVE-2009-0414 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0414 |
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[ 4 ] CVE-2009-0936 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0936 |
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[ 5 ] CVE-2009-0937 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0937 |
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[ 6 ] CVE-2009-0938 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0938 |
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[ 7 ] CVE-2009-0939 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0939 |
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|
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Availability |
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============ |
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This GLSA and any updates to it are available for viewing at |
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the Gentoo Security Website: |
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http://security.gentoo.org/glsa/glsa-200904-11.xml |
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Concerns? |
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========= |
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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http://bugs.gentoo.org. |
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License |
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======= |
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Copyright 2009 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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The contents of this document are licensed under the |
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Creative Commons - Attribution / Share Alike license. |
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|
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http://creativecommons.org/licenses/by-sa/2.5 |
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