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Red Hat Security Advisory 2017-1381-01

Red Hat Security Advisory 2017-1381-01
Posted May 30, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-1381-01 - 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: 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.

tags | advisory, local, root
systems | linux, redhat
advisories | CVE-2017-1000367
MD5 | fe603b76cbd6e5dbdaf3b6098d19c8d5

Red Hat Security Advisory 2017-1381-01

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=====================================================================
Red Hat Security Advisory

Synopsis: Important: sudo security update
Advisory ID: RHSA-2017:1381-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2017:1381
Issue date: 2017-05-30
CVE Names: CVE-2017-1000367
=====================================================================

1. Summary:

An update for sudo is now available for Red Hat Enterprise Linux 5 Extended
Lifecycle Support.

Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Server (v. 5 ELS) - i386, s390x, x86_64

3. Description:

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.

4. 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

5. Bugs fixed (https://bugzilla.redhat.com/):

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

6. Package List:

Red Hat Enterprise Linux Server (v. 5 ELS):

Source:
sudo-1.7.2p1-30.el5_11.src.rpm

i386:
sudo-1.7.2p1-30.el5_11.i386.rpm
sudo-debuginfo-1.7.2p1-30.el5_11.i386.rpm

s390x:
sudo-1.7.2p1-30.el5_11.s390x.rpm
sudo-debuginfo-1.7.2p1-30.el5_11.s390x.rpm

x86_64:
sudo-1.7.2p1-30.el5_11.x86_64.rpm
sudo-debuginfo-1.7.2p1-30.el5_11.x86_64.rpm

These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

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

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2017 Red Hat, Inc.
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