Enomaly ECP/Enomalism: Multiple vulnerabilities in enomalism2.sh (redux) Synopsis All versions of Enomaly ECP/Enomalism[1] before 2.2.1 have multiple issues relating to the use of temporary files in an insecure manner. Fixes for CVE-2008-4990[2] and CVE-2009-0390[3] in 2.1.1 and 2.2 were found to be ineffective. Background Enomaly ECP (formerly Enomalism) is management software for virtual machines. Description Sam Johnston[4] of Australian Online Solutions[5] reported multiple vulnerabilities in enomalism2.sh: - Race condition on $PIDFILE renders 2.1.1 fixes ineffective - Incomplete fixes in 2.1.1/2.2 fail to address stop/restart functions - Root ownership check (ls -l $PIDFILE |grep root) is trivially bypassed by: - changing the symlink's group to one containing the word 'root' or - creating a symlink to any filename containing the word 'root' - Process check (ps -p $PID |grep enomalism2d) is also trivially bypassed. Impact A local attacker could perform a symlink attack to overwrite arbitrary files on the system with root privileges, inject arguments to the 'kill' command to terminate or send arbitrary signals to any process(es) as root or launch a denial of service attack by preventing the virtual machines from starting. Exploits a. while true; do ln -s /etc/passwd /tmp/enomalism2.pid; done b. echo "-9 1" > /tmp/enomalism2.pid c. i. ln -s /tmp/root /tmp/enomalism2.pid ii. chgrp beetroot /tmp/enomalism2.pid Workaround Change PIDFILE from /tmp/enomalism2.pid to /var/run/enomalism2.pid Resolution All Enomaly ECP and Enomalism users should upgrade to version 2.2.1[6] which includes researcher fix. History 2009-02-09 Bug initially reported to Enomaly by mail 2009-02-09 CVE(s) requested from Mitre; TBA 2009-02-09 Product Development Manager acknowledged receipt. "Thanks, we're incorporating a fix for the next release." 2009-02-10 Update announced[7] with no mention of security vulnerability: "ECP 2.2.1 is now available on both sourceforge and pypi. This is a bug-fix release. No new features have been added." 2009-02-14 Publication of vulnerability References 1. http://sourceforge.net/projects/enomalism 2. http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2008-4990 3. http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2009-0390 4. http://samj.net/ 5. http://www.aos.net.au/ 6. http://sourceforge.net/project/showfiles.php?group_id=164855&package_id=186866&release_id=660061 7. http://groups.google.com/group/enomalism/browse_thread/thread/ae94ac7cb5fa7683