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Red Hat Enterprise Linux 8 RHSA-2020-0559-01 Important: ksh Code Injection

red hat
Calendar Grey February 20, 2020
Dist Redhat Esm H88
Red Hat reveals a significant security patch for KornShell in Enterprise Linux 8, addressing critical vulnerabilities related to code injection hazards.
An update for ksh is now available for Red Hat Enterprise Linux 8

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 kornshell arithmetic injection

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 (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


Severity
important
Lowest
Low
Medium
High
Critical

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

Topic

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 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 kornshell arithmetic injection

Relevant Releases Architectures

Red Hat Enterprise Linux AppStream (v. 8) - 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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