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Test ID:1.3.6.1.4.1.25623.1.0.870663
Category:Red Hat Local Security Checks
Title:RedHat Update for policycoreutils RHSA-2011:0414-01
Summary:The remote host is missing an update for the 'policycoreutils'; package(s) announced via the referenced advisory.
Description:Summary:
The remote host is missing an update for the 'policycoreutils'
package(s) announced via the referenced advisory.

Vulnerability Insight:
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.

Affected Software/OS:
policycoreutils on Red Hat Enterprise Linux Desktop (v. 6),
Red Hat Enterprise Linux Server (v. 6),
Red Hat Enterprise Linux Workstation (v. 6)

Solution:
Please Install the Updated Packages.

CVSS Score:
6.9

CVSS Vector:
AV:L/AC:M/Au:N/C:C/I:C/A:C

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2011-1011
BugTraq ID: 46510
http://www.securityfocus.com/bid/46510
http://lists.fedoraproject.org/pipermail/package-announce/2011-March/056227.html
http://archives.neohapsis.com/archives/fulldisclosure/2011-02/0585.html
http://openwall.com/lists/oss-security/2011/02/23/1
http://openwall.com/lists/oss-security/2011/02/23/2
http://www.redhat.com/support/errata/RHSA-2011-0414.html
http://www.securitytracker.com/id?1025291
http://secunia.com/advisories/43415
http://secunia.com/advisories/43844
http://secunia.com/advisories/44034
http://www.vupen.com/english/advisories/2011/0701
http://www.vupen.com/english/advisories/2011/0864
XForce ISS Database: policycoreutils-seunshare-symlink(65641)
https://exchange.xforce.ibmcloud.com/vulnerabilities/65641
CopyrightCopyright (c) 2012 Greenbone Networks GmbH

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