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RHEL 6 : policycoreutils (RHSA-2011:0414)

medium Nessus Plugin ID 53293

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Synopsis

The remote Red Hat host is missing one or more security updates.

Description

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.

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

Update the affected packages.

See Also

https://access.redhat.com/security/cve/cve-2011-1011

https://access.redhat.com/errata/RHSA-2011:0414

Plugin Details

Severity: Medium

ID: 53293

File Name: redhat-RHSA-2011-0414.nasl

Version: 1.16

Type: local

Agent: unix

Published: 4/5/2011

Updated: 1/14/2021

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6.9

Temporal Score: 5.1

Vector: CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:selinux-policy-mls, cpe:/o:redhat:enterprise_linux:6.0, p-cpe:/a:redhat:enterprise_linux:selinux-policy-targeted, p-cpe:/a:redhat:enterprise_linux:policycoreutils, p-cpe:/a:redhat:enterprise_linux:policycoreutils-python, cpe:/o:redhat:enterprise_linux:6, p-cpe:/a:redhat:enterprise_linux:policycoreutils-sandbox, p-cpe:/a:redhat:enterprise_linux:policycoreutils-debuginfo, p-cpe:/a:redhat:enterprise_linux:selinux-policy-minimum, p-cpe:/a:redhat:enterprise_linux:policycoreutils-newrole, p-cpe:/a:redhat:enterprise_linux:selinux-policy, p-cpe:/a:redhat:enterprise_linux:policycoreutils-gui, p-cpe:/a:redhat:enterprise_linux:selinux-policy-doc

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 4/4/2011

Vulnerability Publication Date: 2/24/2011

Reference Information

CVE: CVE-2011-1011

BID: 46510

RHSA: 2011:0414