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Red Hat: RHSA-2017:0535-01 Important: SELinux Sandbox Escape

red hat
Calendar Grey March 15, 2017
Scroller Redhat
A critical security patch for policycoreutils rectifies a sandbox breach risk in Red Hat Enterprise Linux.
An update for policycoreutils is now available for Red Hat Enterprise Linux 7.2 Extended Update Support

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 Enterprise Linux policycoreutils important update 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 ComputeNode EUS (v. 7.2):
Source: policycoreutils-2.2.5-21.el7_2.src.rpm
x86_64: policycoreutils-2.2.5-21.el7_2.x86_64.rpm policycoreutils-debuginfo-2.2.5-21.el7_2.x86_64.rpm policycoreutils-newrole-2.2.5-21.el7_2.x86_64.rpm policycoreutils-python-2.2.5-21.el7_2.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.2):
x86_64: policycoreutils-debuginfo-2.2.5-21.el7_2.i686.rpm policycoreutils-debuginfo-2.2.5-21.el7_2.x86_64.rpm policycoreutils-devel-2.2.5-21.el7_2.i686.rpm policycoreutils-devel-2.2.5-21.el7_2.x86_64.rpm policycoreutils-gui-2.2.5-21.el7_2.x86_64.rpm policycoreutils-restorecond-2.2.5-21.el7_2.x86_64.rpm policycoreutils-sandbox-2.2.5-21.el7_2.x86_64.rpm
Red Hat Enterprise Linux Server EUS (v. 7.2):
Source: policycoreutils-2.2.5-21.el7_2.src.rpm
ppc64: policycoreutils-2.2.5-21.el7_2.ppc64.rpm policycoreutils-debuginfo-2.2.5-21.el7_2.ppc.rpm policycoreutils-debuginfo-2.2.5-21.el7_2.ppc64.rpm policycoreutils-devel-2.2.5-21.el7_2.ppc.rpm policycoreutils-devel-2.2.5-21.el7_2.ppc64.rpm policycoreutils-gui-2.2.5-21.el7_2.ppc64.rpm policycoreutils-newrole-2.2.5-21.el7_2.ppc64.rpm policycoreutils-python-2.2.5-21.el7_2.ppc64.rpm policycoreutils-sandbox-2.2.5-21.el7_2.ppc64.rpm
ppc64le: policycoreutils-2.2.5-21.el7_2.ppc64le.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2017:0535-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2017:0535.html
Issue date: 2017-03-15

Topic

An update for policycoreutils is now available for Red Hat Enterprise Linux7.2 Extended Update Support.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 Enterprise Linux policycoreutils important update sandbox escape

Relevant Releases Architectures

Red Hat Enterprise Linux ComputeNode EUS (v. 7.2) - x86_64

Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.2) - x86_64

Red Hat Enterprise Linux Server EUS (v. 7.2) - ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional EUS (v. 7.2) - ppc64, ppc64le, s390x, x86_64

Bugs Fixed

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

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