php5 - several

Several vulnerabilities have been discovered in PHP, the web scripting
language. The Common Vulnerabilities and Exposures project identifies
the following issues:

• CVE-2011-1938
  The UNIX socket handling allowed attackers to trigger a buffer overflow
  via a long path name.
• CVE-2011-2483
  The crypt_blowfish function did not properly handle 8-bit characters,
  which made it easier for attackers to determine a cleartext password
  by using knowledge of a password hash.
• CVE-2011-4566
  When used on 32 bit platforms, the exif extension could be used to
  trigger an integer overflow in the exif_process_IFD_TAG function
  when processing a JPEG file.
• CVE-2011-4885
  It was possible to trigger hash collisions predictably when parsing
  form parameters, which allows remote attackers to cause a denial of
  service by sending many crafted parameters.
• CVE-2012-0057
  When applying a crafted XSLT transform, an attacker could write files
  to arbitrary places in the filesystem.

NOTE: the fix for
CVE-2011-2483
required changing the behaviour of this function: it is now incompatible with
some old (wrongly) generated hashes for passwords containing 8-bit characters.
See the package NEWS entry for details. This change has not been applied to the
Lenny version of PHP.

For the oldstable distribution (lenny), these problems have been fixed
in version 5.2.6.dfsg.1-1+lenny15.

For the stable distribution (squeeze), these problems have been fixed
in version 5.3.3-7+squeeze6.

For the testing distribution (wheezy) and unstable distribution (sid),
these problems have been fixed in version 5.3.9-1.

We recommend that you upgrade your php5 packages.