World-writable Directory Lockfile Vulnerability in Ubuntu SELinux Initscript

CVE-2011-3151 · MEDIUM Severity

AV:N/AC:M/AU:N/C:N/I:P/A:P

The Ubuntu SELinux initscript before version 1:0.10 used touch to create a lockfile in a world-writable directory. If the OS kernel does not have symlink protections then an attacker can cause a zero byte file to be allocated on any writable filesystem.

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