Some security issues have been reported in PDFjam, which can be exploited by malicious, local users to perform certain actions with escalated privileges.
1) The "pdf90", "pdfjoin", and "pdfnup" scripts use temporary files in an insecure manner. This can be exploited to overwrite arbitrary files via symlink attacks.
2) The "pdf90", "pdfjoin", and "pdfnup" scripts incorrectly prefix the current directory to the "PATH" environment variable. This can be exploited to execute arbitrary commands placed in the /var/tmp/pdflatex script with escalated privileges.
Solution: Update to version 1.21 or later.
Provided and/or discovered by: 1) Reported in a Novell bug report.
2) Reported by Martin Väth in a Gentoo bug report.
Original Advisory: 1) https://bugzilla.novell.com/show_bug.cgi?id=459031
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Subject: PDFjam Insecure Temporary Files
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