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Debian Security Advisory DSA 2649-1 (lighttpd - fixed socket name in world-writable directory)

Information

Severity

Severity

Low

Family

Family

Debian Local Security Checks

CVSSv2 Base

CVSSv2 Base

1.9

CVSSv2 Vector

CVSSv2 Vector

AV:L/AC:M/Au:N/C:N/I:P/A:N

Solution Type

Solution Type

Vendor Patch

Created

Created

9 years ago

Modified

Modified

1 year ago

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.

Common Vulnerabilities and Exposures (CVE)