fish before 2.1.1 allows local users to write to arbitrary files via a symlink attack on (1) /tmp/fishd.log.%s, (2) /tmp/.pac-cache.$USER, (3) /tmp/.yum-cache.$USER, or (4) /tmp/.rpm-cache.$USER.
https://github.com/fish-shell/fish-shell/issues/1440
https://github.com/fish-shell/fish-shell/commit/3225d7e169a9edb2f470c26989e7bc8e0d0355ce
https://bugzilla.redhat.com/show_bug.cgi?id=1092091
http://www.securityfocus.com/bid/67115
http://www.openwall.com/lists/oss-security/2014/09/28/8
http://www.openwall.com/lists/oss-security/2014/05/06/3
http://security.gentoo.org/glsa/glsa-201412-49.xml
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00071.html
http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00059.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-May/132751.html