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Red Hat Enterprise Linux: RHSA-2016-2702-01 Important Sandbox Escape

red hat
Calendar Grey November 14, 2016
Scroller Redhat
Critical security patch for Policycoreutils addressing a sandbox breach flaw in Red Hat Enterprise Linux.
An update for policycoreutils is now available for Red Hat Enterprise Linux 6 and Red Hat Enterprise Linux 7

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Summary

The policycoreutils packages contain the core policy utilities required to manage a SELinux environment.
Security Fix(es):
* It was found that the sandbox tool provided in policycoreutils was vulnerable to a TIOCSTI ioctl attack. A specially crafted program executed via the sandbox command could use this flaw to execute arbitrary commands in the context of the parent shell, escaping the sandbox. (CVE-2016-7545)

Topics%20covered

Topics Covered

security advisory Red Hat important policycoreutils sandbox escape

References

https://access.redhat.com/security/cve/CVE-2016-7545 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux Desktop (v. 6):
Source: policycoreutils-2.0.83-30.1.el6_8.src.rpm
i386: policycoreutils-2.0.83-30.1.el6_8.i686.rpm policycoreutils-debuginfo-2.0.83-30.1.el6_8.i686.rpm policycoreutils-gui-2.0.83-30.1.el6_8.i686.rpm policycoreutils-newrole-2.0.83-30.1.el6_8.i686.rpm policycoreutils-python-2.0.83-30.1.el6_8.i686.rpm policycoreutils-sandbox-2.0.83-30.1.el6_8.i686.rpm
x86_64: policycoreutils-2.0.83-30.1.el6_8.x86_64.rpm policycoreutils-debuginfo-2.0.83-30.1.el6_8.x86_64.rpm policycoreutils-gui-2.0.83-30.1.el6_8.x86_64.rpm policycoreutils-newrole-2.0.83-30.1.el6_8.x86_64.rpm policycoreutils-python-2.0.83-30.1.el6_8.x86_64.rpm policycoreutils-sandbox-2.0.83-30.1.el6_8.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source: policycoreutils-2.0.83-30.1.el6_8.src.rpm
x86_64: policycoreutils-2.0.83-30.1.el6_8.x86_64.rpm policycoreutils-debuginfo-2.0.83-30.1.el6_8.x86_64.rpm policycoreutils-newrole-2.0.83-30.1.el6_8.x86_64.rpm policycoreutils-python-2.0.83-30.1.el6_8.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
x86_64: policycoreutils-debuginfo-2.0.83-30.1.el6_8.x86_64.rpm policycoreutils-gui-2.0.83-30.1.el6_8.x86_64.rpm policycoreutils-sandbox-2.0.83-30.1.el6_8.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source:

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2016:2702-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2016:2702.html
Issue date: 2016-11-14

Topic

An update for policycoreutils is now available for Red Hat Enterprise Linux6 and Red Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat important policycoreutils sandbox escape

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64

Red Hat Enterprise Linux HPC Node (v. 6) - x86_64

Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64

Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

Bugs Fixed

1378577 - CVE-2016-7545 policycoreutils: SELinux sandbox escape via TIOCSTI ioctl

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