Red Hat Bugzilla – Bug 812885
CVE-2012-2104 munin (munin-cgi-graph, munin-fastcgi-graph): Possibility to inject arbitrary strings into munin-cgi-graph.log
Last modified: 2015-08-22 12:08:11 EDT
A security flaw was found in the way munin-cgi-graph and munin-fastcgi-graph tools of the Munin, a network-wide graphing framework performed provided input sanitization. A remote attacker could issue a specially-crafted CGI request, which once processed by munin-cgi-graph / munin-fastcgi-graph tools would allow the attacker to inject terminal escape sequences into the Munin log file, leading to possibility to execute arbitrary commands or overwrite files in such crafted log file was later inspected in terminal honouring such escape sequences.
Reproducer (from http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=668666#5):
printf 'GET /cgi-bin/munin-cgi-graph/%%0afoo%%0a/x/x-x.png HTTP/1.0\r\nHost: localhost\r\nConnection: close\r\n\r\n' | nc localhost 80
This issue affects [*] the versions of the munin package, as shipped with Fedora release of 15 and 16. Please schedule an update once final upstream patch is available.
This issue affects [*] the versions of the munin package, as shipped with Fedora EPEL 5 and Fedora EPEL 6. Please schedule an update once final upstream patch is available.
[*] Though particular Debian BTS entry:
mentions this would be an issue only for Munin v2.x versions, if I looked into the code correctly, the $comment string (to be added into Munin log) isn't properly sanitized even in earlier versions and thus as such, there shouldn't be
precondition causing this to fail on earlier (current Fedora and EPEL Munin versions) too. Though didn't configure Munin to test and confirm this assumption (-^ based only on source code review).
Created munin tracking bugs for this issue
Affects: fedora-all [bug 812893]
Affects: epel-all [bug 812894]
Added CVE as per http://www.openwall.com/lists/oss-security/2012/04/16/6