contrib/pdfmark/pdfroff.sh in GNU troff (aka groff) before 1.21 allows local users to overwrite arbitrary files via a symlink attack on a pdf#####.tmp temporary file.
ftp://ftp.gnu.org/gnu/groff/groff-1.20.1-1.21.diff.gz
bugs.debian.org/cgi-bin/bugreport.cgi?bug=538330
cvsweb.openwall.com/cgi/cvsweb.cgi/Owl/packages/groff/groff-1.20.1-owl-tmp.diff
cvsweb.openwall.com/cgi/cvsweb.cgi/Owl/packages/groff/groff-1.20.1-owl-tmp.diff.diff?r1=1.1;r2=1.2;f=h
lists.apple.com/archives/security-announce/2015/Aug/msg00001.html
openwall.com/lists/oss-security/2009/08/09/1
openwall.com/lists/oss-security/2009/08/10/2
openwall.com/lists/oss-security/2009/08/14/4
openwall.com/lists/oss-security/2009/08/14/5
secunia.com/advisories/44999
www.mandriva.com/security/advisories?name=MDVSA-2013:085
www.mandriva.com/security/advisories?name=MDVSA-2013:086
www.securityfocus.com/bid/36381
support.apple.com/kb/HT205031