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Alerts This Week
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Gentoo: GLSA-201507-02 Normal: Tor Denial of Service Risk

gentoo
Calendar Grey July 6, 2015
Scroller Gentoo
The Gentoo Linux security team has alerted users about multiple security vulnerabilities in Tor that may enable Denial of Service (DoS) attacks, urging everyone to update
Two vulnerabilities have been found in Tor, the worst of which can allow remote attackers to cause a Denial of Service condition.

Summary

Tor does not handle data correctly when specifically crafted data is sent, and also fails to properly verify a descriptor provided by a hidden service directory.

Topics%20covered

Topics Covered

security advisory denial of service gentoo remote attack tor

Resolution

All Tor users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-misc/tor-0.2.6.7"

References

[ 1 ] CVE-2015-2928 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-2928 [ 2 ] CVE-2015-2929 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-2929 [ 3 ] Upstream announcement https://blog.torproject.org/tor-02512-and-0267-are-released/

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/201507-02
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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.

Severity: Normal
Title: Tor: Denial of Service
Date: July 06, 2015
Bugs: #545940
ID: 201507-02

Topics%20covered

Topics Covered

security advisory denial of service gentoo remote attack tor

Synopsis

Two vulnerabilities have been found in Tor, the worst of which can allow remote attackers to cause a Denial of Service condition.

Background

Tor is an implementation of second generation Onion Routing, a connection-oriented anonymizing communication service.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-misc/tor < 0.2.6.7 >= 0.2.6.7

Impact

===== A remote attacker could cause a Denial of Service condition in both a Tor client or a Tor server.

Workaround

There is no known workaround at this time.