GLSA 200711-13: 3proxy: Denial of Service

http://security.gentoo.org/

Severity:	normal
Title:	3proxy: Denial of Service
Date:	11/08/2007
Bugs:	#196772
ID:	200711-13

Synopsis

A vulnerability has been discovered in 3proxy, possibly resulting in a Denial of Service.

Background

3proxy is a really tiny cross-platform proxy servers set, including HTTP, HTTPS, FTP, SOCKS and POP3 support.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-proxy/3proxy	< 0.5.3j	>= 0.5.3j	All supported architectures

Description

3proxy contains a double free vulnerability in the ftpprchild() function, which frees param->hostname and calls the parsehostname() function, which in turn attempts to free param->hostname again.

Impact

A remote attacker could send a specially crafted request to the proxy, possibly resulting in a Denial of Service. Under typical configuration, the scope of this vulnerability is limited to the local network.

Workaround

There is no known workaround at this time.

Resolution

All 3proxy users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-proxy/3proxy-0.5.3j"

References

CVE-2007-5622

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200711-13.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.