GLSA 200606-04: Tor: Several vulnerabilities

http://security.gentoo.org/

Severity:	normal
Title:	Tor: Several vulnerabilities
Date:	06/07/2006
Bugs:	#134329
ID:	200606-04

Synopsis

Tor is vulnerable to a possible buffer overflow, a Denial of Service, information disclosure and information leak.

Background

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

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-misc/tor	< 0.1.1.20	>= 0.1.1.20	All supported architectures

Description

Some integer overflows exist when adding elements to the smartlists. Non-printable characters received from the network are not properly sanitised before being logged. There are additional unspecified bugs in the directory server and in the internal circuits.

Impact

The possible buffer overflow may allow a remote attacker to execute arbitrary code on the server by sending large inputs. The other vulnerabilities can lead to a Denial of Service, a lack of logged information, or some information disclosure.

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

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200606-04.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.