Executive Summary

Summary
Title Tor: Denial of Service
Informations
Name GLSA-201507-02 First vendor Publication 2015-07-06
Vendor Gentoo Last vendor Modification 2015-07-06
Severity (Vendor) Normal Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score Not Defined Attack Range Not Defined
Cvss Impact Score Not Defined Attack Complexity Not Defined
Cvss Expoit Score Not Defined Authentication Not Defined
Calculate full CVSS 2.0 Vectors scores

Detail

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.

Description

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.

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.

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/blog/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

Original Source

Url : http://security.gentoo.org/glsa/glsa-201507-02.xml

Alert History

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0
1
Date Informations
2015-07-08 13:28:47
  • Multiple Updates
2015-07-06 21:25:23
  • First insertion