A weakness and a vulnerability have been reported in PHP, which can be exploited by malicious people to conduct brute force attacks, cause a DoS (Denial of Service), and potentially compromise a vulnerable system.
1) The vulnerability is caused due to an integer overflow error within the phar extension in the "phar_parse_tarfile()" function (ext/phar/tar.c) and can be exploited to cause a heap-based buffer overflow via a specially crafted TAR file.
Successful exploitation of this vulnerability may allow execution of arbitrary code.
2) The weakness is caused due to an error in the DES implementation within the "crypt()" function.
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Subject: PHP phar Extension and "crypt()" Input Handling Vulnerabilities
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