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Debian Security Advisory DSA 2649-1 (lighttpd - fixed socket name in world-writable directory)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
Stefan Buhler 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.
Affected Software
Affected Software
lighttpd on Debian Linux
Detection Method
Detection Method
This check tests the installed software version using the apt package manager.
Solution
Solution
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.