Awstats official workaround flaw
RedTeam found a flaw in the official workaround for the remote command execution vulnerability in awstats discovered by iDefense. Details ======= Product: Awstats Affected Version: <= 6.2 Immune Version: 6.3 OS affected: all Security-Risk: high Remote-Exploit: yes Vendor-URL: http://awstats.sourceforge.net Vendor-Status: informed Advisory-URL: http://www.redteam-pentesting.de/advisories/rt-sa-2005-006 Advisory-Status: public CVE: GENERIC-MAP-NOMATCH (https://cve.mitre.org/cgi-bin/cvename.cgi?name=GENERIC-MAP-NOMATCH#) Introduction ============ iDefense found a remote command execution vulnerability in awstats <= 6.2, see CAN-2005-0116. The official awstats website tells users that they are safe from remote command execution if they set the variable $!AllowToUpdateStatsFromBrowser to 0. This is not true, as the exploit can still be triggered. More Details ============ In awstats.pl the variable $configdir, which is used to exploit, can still be set remotely. Setting $!AllowToUpdateStatsFromBrowser to 0 only removes the link to the button which can be used to trigger updates. The variable can still be assigned per GET request. Proof of Concept ================ http://path/to/awstats/awstats.pl?configdir=|cd%20/tmp;%20touch%20evilfile; Workaround ========== Use the workaround provided by iDefense. See their advisory for the original vulnerability. Fix === Fixed in version 6.3. Security Risk ============= High, as arbitrary commands can be executed on the vulnerable system. History ======= 2005-02-12 eldy@users.sourceforge.net informed 2005-02-12 CVE number requested 2005-02-14 issue does not qualify for a CVE number. posted. 2009-05-08 Updated Advisory URL RedTeam ======= RedTeam is a penetration testing group working at the Laboratory for Dependable Distributed Systems at RWTH-Aachen University. You can find more information on the RedTeam Project at http://www.redteam-pentesting.de
