Ubuntu Security Notice USN-191-1 – Imran Ghory found a race condition in the handling of output files. While a file was unpacked by unzip, a local attacker with write permissions to the target directory could exploit this to change the permissions of arbitrary files of the unzip user.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/40377/usn-191-1.txt
Source: https://packetstormsecurity.com/files/40377/usn-191-1.txt.html