kfreebsd-9 - several

Several vulnerabilities have been discovered in the FreeBSD kernel
that may lead to a privilege escalation or information leak. The
Common Vulnerabilities and Exposures project identifies the following
problems:

• CVE-2013-3077
  Clement Lecigne from the Google Security Team reported an integer
  overflow in computing the size of a temporary buffer in the IP
  multicast code, which can result in a buffer which is too small
  for the requested operation. An unprivileged process can read or
  write pages of memory which belong to the kernel. These may lead
  to exposure of sensitive information or allow privilege
  escalation.
• CVE-2013-4851
  Rick Macklem, Christopher Key and Tim Zingelman reported that the
  FreeBSD kernel incorrectly uses client supplied credentials
  instead of the one configured in exports(5) when filling out the
  anonymous credential for a NFS export, when -network or -host
  restrictions are used at the same time. The remote client may
  supply privileged credentials (e.g. the root user) when accessing
  a file under the NFS share, which will bypass the normal access
  checks.
• CVE-2013-5209
  Julian Seward and Michael Tuexen reported a kernel memory
  disclosure when initializing the SCTP state cookie being sent in
  INIT-ACK chunks, a buffer allocated from the kernel stack is not
  completely initialized. Fragments of kernel memory may be
  included in SCTP packets and transmitted over the network. For
  each SCTP session, there are two separate instances in which a
  4-byte fragment may be transmitted.

This memory might contain sensitive information, such as portions
of the file cache or terminal buffers. This information might be
directly useful, or it might be leveraged to obtain elevated
privileges in some way. For example, a terminal buffer might
include an user-entered password.

For the stable distribution (wheezy), these problems has been fixed in
version 9.0-10+deb70.3.

We recommend that you upgrade your kfreebsd-9 packages.