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Slackware Linux 3.4 makebootdisk temporary file Vulnerability

🗓️ 01 Jul 2014 00:00:00Reported by RootType 
seebug
 seebug
🔗 www.seebug.org👁 11 Views

Slackware Linux 3.4 makebootdisk vulnerability - insecure temporary file creatio

Code

                                                source: http://www.securityfocus.com/bid/78/info

makebootdisk creates the file /tmp/return insecurely and follows symbolic links. An attacker can create a symbolic link from /tmp/return to any file and wait for root to run the program. This will clober the target file. The file created has permissions -rw-r--r--.

$ ln -s /tmp/return /etc/passwd
< wait for root to run makebootdisk >
                              

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