Overly broad permissions can turn one compromised account into a much larger security problem. Learn how to reduce unnecessary access, review privileges, and apply least privilege across modern Linux systems. Review Linux Privileges×

Alerts This Week
Warning Icon 1 492
Alerts This Week
Warning Icon 1 492

Red Hat Enterprise Linux Versions 6 and 7: Critical Sudo Escalation Alert

red hat
Calendar Grey May 30, 2017
Scroller Redhat
Crucial sudo patch released for Red Hat Enterprise Linux addressing serious vulnerability that could lead to unauthorized privilege escalation.
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):
* A flaw was found in the way sudo parsed tty information from the process status file in the proc filesystem. A local user with privileges to execute commands via sudo could use this flaw to escalate their privileges to root. (CVE-2017-1000367)
Red Hat would like to thank Qualys Security for reporting this issue.

Topics%20covered

Topics Covered

security advisory Red Hat Enterprise Linux security impact important update sudo privilege escalation

References

https://access.redhat.com/security/cve/CVE-2017-1000367 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux Desktop (v. 6):
Source: sudo-1.8.6p3-28.el6_9.src.rpm
i386: sudo-1.8.6p3-28.el6_9.i686.rpm sudo-debuginfo-1.8.6p3-28.el6_9.i686.rpm
x86_64: sudo-1.8.6p3-28.el6_9.x86_64.rpm sudo-debuginfo-1.8.6p3-28.el6_9.x86_64.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
i386: sudo-debuginfo-1.8.6p3-28.el6_9.i686.rpm sudo-devel-1.8.6p3-28.el6_9.i686.rpm
x86_64: sudo-debuginfo-1.8.6p3-28.el6_9.i686.rpm sudo-debuginfo-1.8.6p3-28.el6_9.x86_64.rpm sudo-devel-1.8.6p3-28.el6_9.i686.rpm sudo-devel-1.8.6p3-28.el6_9.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source: sudo-1.8.6p3-28.el6_9.src.rpm
x86_64: sudo-1.8.6p3-28.el6_9.x86_64.rpm sudo-debuginfo-1.8.6p3-28.el6_9.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
x86_64: sudo-debuginfo-1.8.6p3-28.el6_9.i686.rpm sudo-debuginfo-1.8.6p3-28.el6_9.x86_64.rpm sudo-devel-1.8.6p3-28.el6_9.i686.rpm sudo-devel-1.8.6p3-28.el6_9.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source: sudo-1.8.6p3-28.el6_9.src.rpm
i386: sudo-1.8.6p3-28.el6_9.i686.rpm sudo-debuginfo-1.8.6p3-28.el6_9.i686.rpm
ppc64: sudo-1.8.6p3-28.el6_9.ppc64.rpm sudo-debuginfo-1.8.6p3-28.el6_9.ppc64.rpm
s390x: sudo-1.8.6p3-28.el6_9.s390x.rpm sudo-debuginfo-1.8.6p3-28.el6_9.s390x.rpm
x86_64: sudo-1.8.6p3-28.el6_9.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2017:1382-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2017:1382
Issue date: 2017-05-30

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 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 security impact important update sudo privilege escalation

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

1453074 - CVE-2017-1000367 sudo: Privilege escalation in via improper get_process_ttyname() parsing

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.