7.8
HIGH CVSS 3.1
CVE-2019-14868
OpenServer ksh Environment Variable Injection Vulnerability
Description

In ksh version 20120801, a flaw was found in the way it evaluates certain environment variables. An attacker could use this flaw to override or bypass environment restrictions to execute shell commands. Services and applications that allow remote unauthenticated attackers to provide one of those environment variables could allow them to exploit this issue remotely.

INFO

Published Date :

April 2, 2020, 5:15 p.m.

Last Modified :

Nov. 21, 2024, 4:27 a.m.

Remotely Exploit :

No

Source :

[email protected]
Affected Products

The following products are affected by CVE-2019-14868 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Debian debian_linux
1 Apple mac_os_x
1 Ksh_project ksh
: Total Affected Vendor : 3 | Products : 3
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 2.0 HIGH [email protected]
CVSS 3.1 HIGH [email protected]
CVSS 3.1 HIGH [email protected]
Solution
Follow the instructions below to mitigate the CVE-2019-14868 vulnerability.
Update the RHEL ksh package based on the guidance in RHSA-2020:5351.
Public PoC/Exploit Available at Github

CVE-2019-14868 has a 1 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2019-14868.

URL Resource
http://seclists.org/fulldisclosure/2020/May/53 Mailing List Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14868 Issue Tracking Third Party Advisory
https://github.com/att/ast/commit/c7de8b641266bac7c77942239ac659edfee9ecd2 Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00015.html Mailing List Third Party Advisory
https://support.apple.com/kb/HT211170 Third Party Advisory
http://seclists.org/fulldisclosure/2020/May/53 Mailing List Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14868 Issue Tracking Third Party Advisory
https://github.com/att/ast/commit/c7de8b641266bac7c77942239ac659edfee9ecd2 Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/07/msg00015.html Mailing List Third Party Advisory
https://support.apple.com/kb/HT211170 Third Party Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2019-14868 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2019-14868 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
MahdiMirzadeh/mksh

Mahdi's build of mksh

Shell Perl C Roff

Updated: 3 years, 4 months ago
0 stars 0 fork 0 watcher
Born at : April 1, 2022, 5:26 p.m. This repo has been linked 1 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2019-14868 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2019-14868 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference http://seclists.org/fulldisclosure/2020/May/53
    Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14868
    Added Reference https://github.com/att/ast/commit/c7de8b641266bac7c77942239ac659edfee9ecd2
    Added Reference https://lists.debian.org/debian-lts-announce/2020/07/msg00015.html
    Added Reference https://support.apple.com/kb/HT211170
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Feb. 12, 2023

    Action Type Old Value New Value
    Changed Description A flaw was found in the way ksh evaluates certain environment variables. An attacker could use this flaw to override or bypass environment restrictions to execute shell commands. Services and applications that allow remote unauthenticated attackers to provide one of those environment variables could allow them to exploit this issue remotely. In ksh version 20120801, a flaw was found in the way it evaluates certain environment variables. An attacker could use this flaw to override or bypass environment restrictions to execute shell commands. Services and applications that allow remote unauthenticated attackers to provide one of those environment variables could allow them to exploit this issue remotely.
    Removed Reference https://access.redhat.com/errata/RHSA-2020:0431 [No Types Assigned]
    Removed Reference https://access.redhat.com/errata/RHSA-2020:0515 [No Types Assigned]
    Removed Reference https://access.redhat.com/errata/RHSA-2020:0559 [No Types Assigned]
    Removed Reference https://access.redhat.com/errata/RHSA-2020:0568 [No Types Assigned]
    Removed Reference https://access.redhat.com/errata/RHSA-2020:1332 [No Types Assigned]
    Removed Reference https://access.redhat.com/errata/RHSA-2020:1333 [No Types Assigned]
    Removed Reference https://access.redhat.com/errata/RHSA-2020:2210 [No Types Assigned]
    Removed Reference https://access.redhat.com/errata/RHSA-2020:5351 [No Types Assigned]
    Removed Reference https://access.redhat.com/errata/RHSA-2020:5352 [No Types Assigned]
    Removed Reference https://access.redhat.com/security/cve/CVE-2019-14868 [No Types Assigned]
    Removed Reference https://bugzilla.redhat.com/show_bug.cgi?id=1757324 [No Types Assigned]
    Added CWE Red Hat, Inc. CWE-77
  • CVE Modified by [email protected]

    Feb. 02, 2023

    Action Type Old Value New Value
    Changed Description In ksh version 20120801, a flaw was found in the way it evaluates certain environment variables. An attacker could use this flaw to override or bypass environment restrictions to execute shell commands. Services and applications that allow remote unauthenticated attackers to provide one of those environment variables could allow them to exploit this issue remotely. A flaw was found in the way ksh evaluates certain environment variables. An attacker could use this flaw to override or bypass environment restrictions to execute shell commands. Services and applications that allow remote unauthenticated attackers to provide one of those environment variables could allow them to exploit this issue remotely.
    Removed CVSS V3 Red Hat, Inc. AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
    Added CVSS V3.1 Red Hat, Inc. AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
    Added Reference https://access.redhat.com/errata/RHSA-2020:2210 [No Types Assigned]
    Added Reference https://access.redhat.com/errata/RHSA-2020:1332 [No Types Assigned]
    Added Reference https://access.redhat.com/errata/RHSA-2020:5351 [No Types Assigned]
    Added Reference https://access.redhat.com/errata/RHSA-2020:5352 [No Types Assigned]
    Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=1757324 [No Types Assigned]
    Added Reference https://access.redhat.com/errata/RHSA-2020:0568 [No Types Assigned]
    Added Reference https://access.redhat.com/errata/RHSA-2020:0515 [No Types Assigned]
    Added Reference https://access.redhat.com/errata/RHSA-2020:0559 [No Types Assigned]
    Added Reference https://access.redhat.com/errata/RHSA-2020:0431 [No Types Assigned]
    Added Reference https://access.redhat.com/errata/RHSA-2020:1333 [No Types Assigned]
    Added Reference https://access.redhat.com/security/cve/CVE-2019-14868 [No Types Assigned]
    Removed CWE Red Hat, Inc. CWE-77
  • Modified Analysis by [email protected]

    Oct. 09, 2020

    Action Type Old Value New Value
    Changed Reference Type http://seclists.org/fulldisclosure/2020/May/53 No Types Assigned http://seclists.org/fulldisclosure/2020/May/53 Mailing List, Third Party Advisory
    Changed Reference Type https://lists.debian.org/debian-lts-announce/2020/07/msg00015.html No Types Assigned https://lists.debian.org/debian-lts-announce/2020/07/msg00015.html Mailing List, Third Party Advisory
    Changed Reference Type https://support.apple.com/kb/HT211170 No Types Assigned https://support.apple.com/kb/HT211170 Third Party Advisory
    Removed CWE NIST CWE-74
    Added CWE NIST CWE-77
    Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:* versions up to (excluding) 10.15.5
  • CVE Modified by [email protected]

    Jul. 21, 2020

    Action Type Old Value New Value
    Added Reference https://lists.debian.org/debian-lts-announce/2020/07/msg00015.html [No Types Assigned]
  • CVE Modified by [email protected]

    May. 29, 2020

    Action Type Old Value New Value
    Added Reference http://seclists.org/fulldisclosure/2020/May/53 [No Types Assigned]
  • CVE Modified by [email protected]

    May. 27, 2020

    Action Type Old Value New Value
    Added Reference https://support.apple.com/kb/HT211170 [No Types Assigned]
  • Initial Analysis by [email protected]

    Apr. 03, 2020

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:C/I:C/A:C)
    Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14868 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14868 Issue Tracking, Third Party Advisory
    Changed Reference Type https://github.com/att/ast/commit/c7de8b641266bac7c77942239ac659edfee9ecd2 No Types Assigned https://github.com/att/ast/commit/c7de8b641266bac7c77942239ac659edfee9ecd2 Patch, Third Party Advisory
    Added CWE NIST CWE-74
    Added CPE Configuration OR *cpe:2.3:a:ksh_project:ksh:20120801:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 7.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Base CVSS Score: 7.2
Access Vector
Access Complexity
Authentication
Confidentiality Impact
Integrity Impact
Availability Impact
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

1.01 }} 0.31%

score

0.76032

percentile