The phar_make_dirstream function in ext/phar/dirstream.c in PHP before 5.6.18 and 7.x before 7.0.3 mishandles zero-size ././@LongLink files, which allows remote attackers to cause a denial of service (uninitialized pointer dereference) or possibly have unspecified other impact via a crafted TAR archive.<a href=http://cwe.mitre.org/data/definitions/824.html>CWE-824: Access of Uninitialized Pointer</a> http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-4343
