Issued:
2011-04-04
Updated:
2011-04-04

RHSA-2011:0414 - Important: policycoreutils security update

Synopsis

Important: policycoreutils security update

Type/Severity

Security Advisory Important

Topic

Updated policycoreutils packages that fix one security issue are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having important security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

Description

The policycoreutils packages contain the core utilities that are required for the basic operation of a Security-Enhanced Linux (SELinux) system and its policies.

It was discovered that the seunshare utility did not enforce proper file permissions on the directory used as an alternate temporary directory mounted as /tmp/. A local user could use this flaw to overwrite files or, possibly, execute arbitrary code with the privileges of a setuid or setgid application that relies on proper /tmp/ permissions, by running that application via seunshare. (CVE-2011-1011)

Red Hat would like to thank Tavis Ormandy for reporting this issue.

This update also introduces the following changes:

  • The seunshare utility was moved from the main policycoreutils subpackage to the policycoreutils-sandbox subpackage. This utility is only required by the sandbox feature and does not need to be installed by default.

  • Updated selinux-policy packages that add the SELinux policy changes required by the seunshare fixes.

All policycoreutils users should upgrade to these updated packages, which correct this issue.

Solution

Before applying this update, make sure all previously-released errata relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at This content is not included.https://access.redhat.com/kb/docs/DOC-11259

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for Scientific Computing6x86_64
Red Hat Enterprise Linux for Power, big endian6ppc64
Red Hat Enterprise Linux for IBM z Systems6s390x
Red Hat Enterprise Linux Workstation6x86_64
Red Hat Enterprise Linux Workstation6i386
Red Hat Enterprise Linux Server6x86_64
Red Hat Enterprise Linux Server6i386
Red Hat Enterprise Linux Server from RHUI6x86_64
Red Hat Enterprise Linux Server from RHUI6i386
Red Hat Enterprise Linux Server - Extended Life Cycle Support6x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support6i386
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension6x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension6i386
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems)6s390x
Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems)6s390x
Red Hat Enterprise Linux Desktop6x86_64
Red Hat Enterprise Linux Desktop6i386

Updated Packages

  • selinux-policy-targeted-3.7.19-54.el6_0.5.noarch.rpm
  • policycoreutils-newrole-2.0.83-19.8.el6_0.x86_64.rpm
  • policycoreutils-2.0.83-19.8.el6_0.src.rpm
  • policycoreutils-gui-2.0.83-19.8.el6_0.ppc64.rpm
  • policycoreutils-python-2.0.83-19.8.el6_0.i686.rpm
  • policycoreutils-2.0.83-19.8.el6_0.x86_64.rpm
  • policycoreutils-python-2.0.83-19.8.el6_0.s390x.rpm
  • policycoreutils-newrole-2.0.83-19.8.el6_0.ppc64.rpm
  • policycoreutils-debuginfo-2.0.83-19.8.el6_0.i686.rpm
  • policycoreutils-debuginfo-2.0.83-19.8.el6_0.ppc64.rpm
  • policycoreutils-sandbox-2.0.83-19.8.el6_0.i686.rpm
  • policycoreutils-sandbox-2.0.83-19.8.el6_0.x86_64.rpm
  • policycoreutils-gui-2.0.83-19.8.el6_0.s390x.rpm
  • selinux-policy-doc-3.7.19-54.el6_0.5.noarch.rpm
  • policycoreutils-2.0.83-19.8.el6_0.s390x.rpm
  • policycoreutils-sandbox-2.0.83-19.8.el6_0.s390x.rpm
  • policycoreutils-python-2.0.83-19.8.el6_0.ppc64.rpm
  • selinux-policy-mls-3.7.19-54.el6_0.5.noarch.rpm
  • policycoreutils-newrole-2.0.83-19.8.el6_0.i686.rpm
  • policycoreutils-gui-2.0.83-19.8.el6_0.i686.rpm
  • policycoreutils-python-2.0.83-19.8.el6_0.x86_64.rpm
  • selinux-policy-minimum-3.7.19-54.el6_0.5.noarch.rpm
  • policycoreutils-2.0.83-19.8.el6_0.ppc64.rpm
  • policycoreutils-debuginfo-2.0.83-19.8.el6_0.x86_64.rpm
  • policycoreutils-sandbox-2.0.83-19.8.el6_0.ppc64.rpm
  • policycoreutils-2.0.83-19.8.el6_0.i686.rpm
  • policycoreutils-newrole-2.0.83-19.8.el6_0.s390x.rpm
  • policycoreutils-gui-2.0.83-19.8.el6_0.x86_64.rpm
  • selinux-policy-3.7.19-54.el6_0.5.noarch.rpm
  • selinux-policy-3.7.19-54.el6_0.5.src.rpm
  • policycoreutils-debuginfo-2.0.83-19.8.el6_0.s390x.rpm

Fixes

CVEs

References

Additional information