linux-2.6 user-mode-linux - several vulnerabilities

Several vulnerabilities have been discovered in the Linux kernel that
may lead to a denial of service, privilege escalation or a sensitive
memory leak. The Common Vulnerabilities and Exposures project
identifies the following problems:

• CVE-2009-0028
  Chris Evans discovered a situation in which a child process can
  send an arbitrary signal to its parent.
• CVE-2009-0834
  Roland McGrath discovered an issue on amd64 kernels that allows
  local users to circumvent system call audit configurations which
  filter based on the syscall numbers or argument details.
• CVE-2009-0835
  Roland McGrath discovered an issue on amd64 kernels with
  CONFIG_SECCOMP enabled. By making a specially crafted syscall,
  local users can bypass access restrictions.
• CVE-2009-0859
  Jiri Olsa discovered that a local user can cause a denial of
  service (system hang) using a SHM_INFO shmctl call on kernels
  compiled with CONFIG_SHMEM disabled. This issue does not affect
  prebuilt Debian kernels.
• CVE-2009-1046
  Mikulas Patocka reported an issue in the console subsystem that
  allows a local user to cause memory corruption by selecting a
  small number of 3-byte UTF-8 characters.
• CVE-2009-1072
  Igor Zhbanov reported that nfsd was not properly dropping
  CAP_MKNOD, allowing users to create device nodes on file systems
  exported with root_squash.
• CVE-2009-1184
  Dan Carpenter reported a coding issue in the selinux subsystem
  that allows local users to bypass certain networking checks when
  running with compat_net=1.
• CVE-2009-1192
  Shaohua Li reported an issue in the AGP subsystem they may allow
  local users to read sensitive kernel memory due to a leak of
  uninitialized memory.
• CVE-2009-1242
  Benjamin Gilbert reported a local denial of service vulnerability
  in the KVM VMX implementation that allows local users to trigger
  an oops.
• CVE-2009-1265
  Thomas Pollet reported an overflow in the af_rose implementation
  that allows remote attackers to retrieve uninitialized kernel
  memory that may contain sensitive data.
• CVE-2009-1337
  Oleg Nesterov discovered an issue in the exit_notify function that
  allows local users to send an arbitrary signal to a process by
  running a program that modifies the exit_signal field and then
  uses an exec system call to launch a setuid application.
• CVE-2009-1338
  Daniel Hokka Zakrisson discovered that a kill(-1) is permitted to
  reach processes outside of the current process namespace.
• CVE-2009-1439
  Pavan Naregundi reported an issue in the CIFS filesystem code that
  allows remote users to overwrite memory via a long
  nativeFileSystem field in a Tree Connect response during mount.

For the oldstable distribution (etch), these problems, where applicable,
will be fixed in future updates to linux-2.6 and linux-2.6.24.

For the stable distribution (lenny), these problems have been fixed in
version 2.6.26-15lenny2.

We recommend that you upgrade your linux-2.6 and user-mode-linux packages.

Note: Debian carefully tracks all known security issues across every
linux kernel package in all releases under active security support.
However, given the high frequency at which low-severity security
issues are discovered in the kernel and the resource requirements of
doing an update, updates for lower priority issues will normally not
be released for all kernels at the same time. Rather, they will be
released in a staggered or “leap-frog” fashion.