Several remote vulnerabilities have been discovered in PHP, a server-side, HTML-embedded scripting language, which may lead to the execution of arbitrary code. The Common Vulnerabilities and Exposures project identifies the following problems:
Stefan Esser discovered HTTP response splitting vulnerabilities in the session extension. This only affects Debian 3.1 (Sarge).
Stefan Esser discovered that an integer overflow in memory allocation routines allows the bypass of memory limit restrictions. This only affects Debian 3.1 (Sarge) on 64 bit architectures.
It was discovered that a buffer overflow in the xmlrpc extension allows the execution of arbitrary code.
For the oldstable distribution (sarge) these problems have been fixed in version 4.3.10-22.
For the stable distribution (etch) these problems have been fixed in version 4.4.4-8+etch4.
The unstable distribution (sid) no longer contains php4.
We recommend that you upgrade your PHP packages. Sarge packages for hppa, mips and powerpc are not yet available, due to problems on the build hosts. They will be provided later.
MD5 checksums of the listed files are available in the original advisory.