php: memory corruption in openssl_x509_parse()

The asn1timetotimet function in ext/openssl/openssl.c in PHP before 5.3.28, 5.4.x before 5.4.23, and 5.5.x before 5.5.7 does not properly parse 1 notBefore and 2 notAfter timestamps in X.509 certificates, which allows remote attackers to execute arbitrary code or cause a denial of service memory...