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GLSA
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Joined: 12 May 2004
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PostPosted: Thu Aug 25, 2005 5:34 am    Post subject: [ GLSA 200508-16 ] Tor: Information disclosure Reply with quote

Gentoo Linux Security Advisory

Title: Tor: Information disclosure (GLSA 200508-16)
Severity: low
Exploitable: remote
Date: August 25, 2005
Bug(s): #102245
ID: 200508-16

Synopsis


A flaw in Tor leads to the disclosure of information and the loss of
anonymity, integrity and confidentiality.


Background


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


Affected Packages

Package: net-misc/tor
Vulnerable: < 0.1.0.14
Unaffected: >= 0.1.0.14
Architectures: All supported architectures


Description


The Diffie-Hellman implementation of Tor fails to verify the
cryptographic strength of keys which are used during handshakes.


Impact


By setting up a malicious Tor server and enticing users to use
this server as first hop, a remote attacker could read and modify all
traffic of the user.


Workaround


There is no known workaround at this time.


Resolution


All Tor users should upgrade to the latest version:
Code:
# emerge --sync
    # emerge --ask --oneshot --verbose ">=net-misc/tor-0.1.0.14"


References

CAN-2005-2643
Tor Security Announcement


Last edited by GLSA on Wed Jun 01, 2011 4:20 am; edited 5 times in total
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