A security issue has been reported in util-linux, which can be exploited by malicious, local users to cause a DoS (Denial of Service).
The security is caused due to the "mount" utility not properly handling the SIGXFSZ signal when e.g. adding new file system descriptions to "/etc/mtab", which can be exploited to e.g. corrupt the "/etc/mtab" file or leave a stale "/etc/mtab~" file by setting a low RLIMIT_FSIZE limit.
Solution: Restrict access to trusted users only.
Provided and/or discovered by: Dan Rosenberg
Original Advisory: http://www.openwall.com/lists/oss-security/2011/03/04/9
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Subject: util-linux mount RLIMIT_FSIZE Security Issue
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