Some security issues have been reported in Website META Language, which can be exploited by malicious, local users to perform certain actions with escalated privileges.
The security issues are caused due to insecure handling of temporary files in wml_backend/p1_ipp/ipp.src, wml_contrib/wmg.cgi, and wml_backend/p3_eperl/eperl_sys.c. This can be exploited via symlink attacks to overwrite or delete arbitrary files with the privileges of the user running the program.
The security issues are reported in version 2.0.11. Other versions may also be affected.
Solution: Restrict access to the temporary directory to trusted users only.
Provided and/or discovered by: Reported via a Debian bug report.
Original Advisory: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=463907
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Subject: Website META Language Insecure Temporary Files
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