From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.15) Gecko/20080702 Fedora/2.0.0.15-1.fc8 Firefox/2.0.0.15 Description of problem: lgroupmod has the same problem which is described in bz#454443. Some strings are not checked for ':'. Version-Release number of selected component (if applicable): libuser-0.56.6-2 How reproducible: Always Steps to Reproduce: # lgroupadd poorgroup # grep poor /etc/group poorgroup:x:502: # grep poor /etc/gshadow poorgroup:!!:: # lgroupmod -n "poor:group" poorgroup Group poorgroup could not be modified: data not found in file # grep poor /etc/group poor:x:x:502: # grep poor /etc/gshadow poor:!!:!!:: # lgroupdel poorgroup Group poorgroup does not exist. # lgroupdel "poor:group" Group poor:group does not exist. # lgroupdel "poor" ** (process:14622): WARNING **: invalid ID Group poor could not be deleted: group poor has no GID Actual Results: lgroupmod accepts a group name containing ':'. Expected Results: lgroupmod refuses a group name containing ':'. Additional info:
Following parameters of lgroupmod are vulnerable to "<some>:<thing>" attack: -A -M -n -p RHTS test for this bug is available ( /CoreOS/libuser/Regression/bz454646-lgroupmod-corrupt-etc-group ).
Thanks for your report. Parts should be fixed in current development version, the rest is https://fedorahosted.org/libuser/ticket/2 .
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