Stefan Bühler discovered that the Debian specific configuration file for lighttpd webserver FastCGI PHP support used a fixed socket name in the world-writable /tmp directory. A symlink attack or a race condition could be exploited by a malicious user on the same machine to take over the PHP control

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Debian Security Advisory DSA-2649-1                   This email address is being protected from spambots. You need JavaScript enabled to view it.
	
http://www.debian.org/security/                         Yves-Alexis Perez
March 15, 2013                         http://www.debian.org/security/faq
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Package        : lighttpd
Vulnerability  : fixed socket name in world-writable directory
Problem type   : local
Debian-specific: yes
CVE ID         : CVE-2013-1427
Debian Bug     : 

Stefan Bühler discovered that the Debian specific configuration file for
lighttpd webserver FastCGI PHP support used a fixed socket name in the
world-writable /tmp directory. A symlink attack or a race condition could be
exploited by a malicious user on the same machine to take over the PHP control
socket and for example force the webserver to use a different PHP version.

As the fix is in a configuration file lying in /etc, the update won't be
enforced if the file has been modified by the administrator. In that case, care
should be taken to manually apply the fix.

For the stable distribution (squeeze), this problem has been fixed in
version 1.4.28-2+squeeze1.3.

For the testing distribution (wheezy), this problem has been fixed in
version 1.4.31-4.

For the unstable distribution (sid), this problem has been fixed in
version 1.4.31-4.

We recommend that you upgrade your lighttpd packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: http://www.debian.org/security/

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