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RedHat: RHSA-2020-0431-01 Important: ksh Code Injection Threat

red hat
Calendar Grey February 5, 2020
Dist Redhat Esm H88
Critical security update for ksh on Red Hat Enterprise Linux addresses code injection issue with a CVSS score of 7.5.
An update for ksh is now available for Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions

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

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.

Topics%20covered

Topics Covered

security advisory security update important red hat enterprise code injection environment variables ksh

References

https://access.redhat.com/security/cve/CVE-2019-14868 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux AppStream E4S (v. 8.0):
Source: ksh-20120801-253.el8_0.src.rpm
aarch64: ksh-20120801-253.el8_0.aarch64.rpm ksh-debuginfo-20120801-253.el8_0.aarch64.rpm ksh-debugsource-20120801-253.el8_0.aarch64.rpm
ppc64le: ksh-20120801-253.el8_0.ppc64le.rpm ksh-debuginfo-20120801-253.el8_0.ppc64le.rpm ksh-debugsource-20120801-253.el8_0.ppc64le.rpm
s390x: ksh-20120801-253.el8_0.s390x.rpm ksh-debuginfo-20120801-253.el8_0.s390x.rpm ksh-debugsource-20120801-253.el8_0.s390x.rpm
x86_64: ksh-20120801-253.el8_0.x86_64.rpm ksh-debuginfo-20120801-253.el8_0.x86_64.rpm ksh-debugsource-20120801-253.el8_0.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/


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2020:0431-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:0431
Issue date: 2020-02-05

Topic

An update for ksh is now available for Red Hat Enterprise Linux 8.0 UpdateServices for SAP Solutions.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 security update important red hat enterprise code injection environment variables ksh

Relevant Releases Architectures

Red Hat Enterprise Linux AppStream E4S (v. 8.0) - aarch64, ppc64le, s390x, x86_64

Bugs Fixed

1757324 - CVE-2019-14868 ksh: certain environment variables interpreted as arithmetic expressions on startup, leading to code injection

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