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AUSCERT External Security Bulletin Redistribution
ESB-2020.0630
ksh security update
21 February 2020
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: ksh
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux WS/Desktop 8
Red Hat Enterprise Linux Server 8
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-14868
Reference: ESB-2020.0539
ESB-2020.0426
Original Bulletin:
https://access.redhat.com/errata/RHSA-2020:0559
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Red Hat Security Advisory
Synopsis: Important: ksh security update
Advisory ID: RHSA-2020:0559-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:0559
Issue date: 2020-02-20
CVE Names: CVE-2019-14868
=====================================================================
1. Summary:
An update for ksh is now available for Red Hat Enterprise Linux 8.
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 AppStream (v. 8) - aarch64, ppc64le, s390x, x86_64
3. Description:
KornShell (ksh) is a Unix shell developed by AT&T Bell Laboratories, which
is backward-compatible with the Bourne shell (sh) and includes many
features of the C shell. The most recent version is KSH-93. KornShell
complies with the POSIX.2 standard (IEEE Std 1003.2-1992).
Security Fix(es):
* ksh: certain environment variables interpreted as arithmetic expressions
on startup, leading to code injection (CVE-2019-14868)
For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.
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/):
1757324 - CVE-2019-14868 ksh: certain environment variables interpreted as arithmetic expressions on startup, leading to code injection
6. Package List:
Red Hat Enterprise Linux AppStream (v. 8):
Source:
ksh-20120801-253.el8_1.src.rpm
aarch64:
ksh-20120801-253.el8_1.aarch64.rpm
ksh-debuginfo-20120801-253.el8_1.aarch64.rpm
ksh-debugsource-20120801-253.el8_1.aarch64.rpm
ppc64le:
ksh-20120801-253.el8_1.ppc64le.rpm
ksh-debuginfo-20120801-253.el8_1.ppc64le.rpm
ksh-debugsource-20120801-253.el8_1.ppc64le.rpm
s390x:
ksh-20120801-253.el8_1.s390x.rpm
ksh-debuginfo-20120801-253.el8_1.s390x.rpm
ksh-debugsource-20120801-253.el8_1.s390x.rpm
x86_64:
ksh-20120801-253.el8_1.x86_64.rpm
ksh-debuginfo-20120801-253.el8_1.x86_64.rpm
ksh-debugsource-20120801-253.el8_1.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-2019-14868
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 2020 Red Hat, Inc.
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