The default session serializer in PHP 5.2 through 5.2.13 and 5.3 through 5.3.2 does not properly handle the PS_UNDEF_MARKER marker, which allows context-dependent attackers to modify arbitrary session variables via a crafted session variable name.

The default session serializer in PHP 5.2 through 5.2.13 and 5.3 through 5.3.2 does not properly handle the PS_UNDEF_MARKER marker, which allows context-dependent attackers to modify arbitrary session variables via a crafted session variable name.

php: XSS and SQL injection bypass via crafted overlong UTF-8 encoded string php: NULL pointer dereference in XML-RPC extension php: LCG entropy weakness php: fnmatch long pattern stack memory exhaustion (MOPS-2010-021) php: information leak vulnerability in var_export() php: session serializer session data injection vulnerability (MOPS-2010-060) php: XSS mitigation bypass via utf8_decode()