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Red Hat Enterprise Linux 6 & 7: RHSA-2016-2872-01 Moderate Sudo Threat

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Calendar Grey December 6, 2016
Scroller Redhat
Latest security patch for sudo in RHEL 6 and 7 targets noexec circumvention vulnerabilities. Ensure timely implementation of updates.
An update for sudo 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 sudo packages contain the sudo utility which allows system administrators to provide certain users with the permission to execute privileged commands, which are used for system management purposes, without having to log in as root.
Security Fix(es):
* It was discovered that the sudo noexec restriction could have been bypassed if application run via sudo executed system(), popen(), or wordexp() C library functions with a user supplied argument. A local user permitted to run such application via sudo with noexec restriction could use these flaws to execute arbitrary commands with elevated privileges. (CVE-2016-7032, CVE-2016-7076)
These issues were discovered by Florian Weimer (Red Hat).

Topics%20covered

Topics Covered

security advisory moderate issue system privilege RHEL 6 sudo update RHEL 7 noexec bypass

References

https://access.redhat.com/security/cve/CVE-2016-7032 https://access.redhat.com/security/cve/CVE-2016-7076 https://access.redhat.com/security/updates/classification/#moderate

Package List

Red Hat Enterprise Linux Desktop (v. 6):
Source: sudo-1.8.6p3-25.el6_8.src.rpm
i386: sudo-1.8.6p3-25.el6_8.i686.rpm sudo-debuginfo-1.8.6p3-25.el6_8.i686.rpm
x86_64: sudo-1.8.6p3-25.el6_8.x86_64.rpm sudo-debuginfo-1.8.6p3-25.el6_8.x86_64.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
i386: sudo-debuginfo-1.8.6p3-25.el6_8.i686.rpm sudo-devel-1.8.6p3-25.el6_8.i686.rpm
x86_64: sudo-debuginfo-1.8.6p3-25.el6_8.i686.rpm sudo-debuginfo-1.8.6p3-25.el6_8.x86_64.rpm sudo-devel-1.8.6p3-25.el6_8.i686.rpm sudo-devel-1.8.6p3-25.el6_8.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source: sudo-1.8.6p3-25.el6_8.src.rpm
x86_64: sudo-1.8.6p3-25.el6_8.x86_64.rpm sudo-debuginfo-1.8.6p3-25.el6_8.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
x86_64: sudo-debuginfo-1.8.6p3-25.el6_8.i686.rpm sudo-debuginfo-1.8.6p3-25.el6_8.x86_64.rpm sudo-devel-1.8.6p3-25.el6_8.i686.rpm sudo-devel-1.8.6p3-25.el6_8.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source: sudo-1.8.6p3-25.el6_8.src.rpm
i386: sudo-1.8.6p3-25.el6_8.i686.rpm sudo-debuginfo-1.8.6p3-25.el6_8.i686.rpm
ppc64: sudo-1.8.6p3-25.el6_8.ppc64.rpm sudo-debuginfo-1.8.6p3-25.el6_8.ppc64.rpm
s390x: sudo-1.8.6p3-25.el6_8.s390x.rpm sudo-debuginfo-1.8.6p3-25.el6_8.s390x.rpm
x86_64: sudo-1.8.6p3-25.el6_8.x86_64.rpm

Read the Full Advisory


Advisory ID: RHSA-2016:2872-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2016:2872.html
Issue date: 2016-12-06

Topic

An update for sudo is now available for Red Hat Enterprise Linux 6 and RedHat Enterprise Linux 7.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory moderate issue system privilege RHEL 6 sudo update RHEL 7 noexec bypass

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 Desktop Optional (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. 6) - i386, ppc64, 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. 6) - i386, x86_64

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

Bugs Fixed

1372830 - CVE-2016-7032 sudo: noexec bypass via system() and popen()

1384982 - CVE-2016-7076 sudo: noexec bypass via wordexp()

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