PHP4 has been reported prone to a potential integer overflow vulnerability. The issue is reported to present itself in the base64_encode() function that is distributed as part of the PHP4 API. Although unconfirmed it has been conjectured that this issue may be due to an unsigned integer value wrapping to a value of zero. This value may then be used in boundary controls, or in arithmetic that may potentially influence execution flow or result in the corruption of sensitive regions of memory. It is currently unknown whether this condition is exploitable or not.
PHP4 has been reported prone to a potential integer overflow vulnerability. The issue is reported to present itself in the base64_encode() function that is distributed as part of the PHP4 API. Although unconfirmed it has been conjectured that this issue may be due to an unsigned integer value wrapping to a value of zero. This value may then be used in boundary controls, or in arithmetic that may potentially influence execution flow or result in the corruption of sensitive regions of memory. It is currently unknown whether this condition is exploitable or not.