A security issue has been reported in libuser, which can be exploited by malicious people to bypass certain security restrictions.
The security issue is caused due to libuser setting a default user password when e.g. not specifying a password while adding a new user via the "luseradd" utility, which can be exploited to bypass certain authentication checks with a known password.
The security issue is reported in versions prior to 0.57.
Solution: Update to version 0.57.
Provided and/or discovered by: Reported in a Red Hat bug report.
Original Advisory: https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-0002
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Subject: libuser Default Password Security Issue
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