A security issue has been discovered in GNU Gnash, which can be exploited by malicious, local users to perform certain actions with escalated privileges.
The security issue is caused due to the configure script using temporary files in an insecure manner. This can be exploited via symlink attacks to e.g. overwrite arbitrary files with the privileges of the user running the script.
The security issue is confirmed in version 0.8.8. Other versions may also be affected.
Solution: Update to version 0.8.9.
Provided and/or discovered by: Reported in a Debian bug by Jakub Wilk.
Original Advisory: Debian Bug #605419:
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Subject: GNU Gnash Insecure Temporary Files Security Issue
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