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CVE-2019-14868

Published: 2 April 2020

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.

From the Ubuntu Security Team

It was discovered that Korn Shell incorrectly handled environment variables. A remote attacker could possibly use this issue to execute arbitrary code.

Priority

Low

Cvss 3 Severity Score

7.8

Score breakdown

Status

Package Release Status
ksh
Launchpad, Ubuntu, Debian
bionic Needs triage

disco Ignored
(end of life)
eoan Ignored
(end of life)
focal Not vulnerable
(2020.0.0-5)
groovy Not vulnerable
(2020.0.0-5)
hirsute Not vulnerable
(2020.0.0-5)
impish Not vulnerable
(2020.0.0-5)
jammy Does not exist

kinetic Does not exist

lunar Does not exist

mantic Does not exist

noble Does not exist

trusty
Released (93u+20120801-1ubuntu0.14.04.1+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream Needs triage

xenial Needs triage

Severity score breakdown

Parameter Value
Base score 7.8
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H