Executive Summary

Summary
Title ksh security update
Informations
Name RHSA-2020:0431 First vendor Publication 2020-02-05
Vendor RedHat Last vendor Modification 2020-02-05
Severity (Vendor) N/A Revision 01

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Overall CVSS Score 7.8
Base Score 7.8 Environmental Score 7.8
impact SubScore 5.9 Temporal Score 7.8
Exploitabality Sub Score 1.8
 
Attack Vector Local Attack Complexity Low
Privileges Required Low User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact High Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:L/Au:N/C:C/I:C/A:C)
Cvss Base Score 7.2 Attack Range Local
Cvss Impact Score 10 Attack Complexity Low
Cvss Expoit Score 3.9 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Problem Description:

An update for ksh is now available for Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions.

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 E4S (v. 8.0) - 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

Original Source

Url : https://rhn.redhat.com/errata/RHSA-2020-0431.html

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-77 Improper Sanitization of Special Elements used in a Command ('Command Injection')

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 2
Application 1
Os 188
Os 1

Alert History

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0
1
Date Informations
2023-02-02 21:36:33
  • Multiple Updates
2020-03-19 13:19:56
  • First insertion