acinclude.m4, as used in the configure script in PHP 5.5.13 and earlier, allows local users to overwrite arbitrary files via a symlink attack on the /tmp/phpglibccheck file.

References

• https://nvd.nist.gov/vuln/detail/CVE-2014-3981
• https://bugs.php.net/bug.php?id=67390
• https://bugzilla.redhat.com/show_bug.cgi?id=1104978
• https://support.apple.com/HT204659
• http://git.php.net/?p=php-src.git;a=commit;h=91bcadd85e20e50d3f8c2e9721327681640e6f16
• http://lists.apple.com/archives/security-announce/2015/Apr/msg00001.html
• http://marc.info/?l=bugtraq&m=141017844705317&w=2
• http://marc.info/?l=bugtraq&m=141390017113542&w=2
• http://openwall.com/lists/oss-security/2014/06/06/12
• http://seclists.org/fulldisclosure/2014/Jun/21
• http://support.apple.com/kb/HT6443
• http://www-01.ibm.com/support/docview.wss?uid=swg21683486
• http://www.oracle.com/technetwork/topics/security/bulletinjan2015-2370101.html