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CVE-2019-14868· NVD / CVE Program· CNA redhat

In ksh version 20120801, a flaw was found in the way it evaluates certain environment variables.

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.3% (FIRST EPSS); higher than 71.7% of all records.
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: ksh (Debian:11) 2020.0.0-2.1; ksh (Debian:9) 93u+20120801-3.1+deb9u1; ksh (openSUSE:Tumbleweed) 93vu-10.1.

Low priority for now. Upgrade to ksh (Debian:11) 2020.0.0-2.1; ksh (Debian:9) 93u+20120801-3.1+deb9u1; ksh (openSUSE:Tumbleweed) 93vu-10.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Apr 2, 2020
Updated
Jun 16, 2026
EPSS
1.3% · 71th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.3%

CNA vs NVD score

NVD
7.8
CNA · redhat
7.4
0.4 point gap

CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
ksh projectksh
debiandebian linux
applemac os x

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • apple mac os xbefore 10.15.5
  • debian debian linux9.0
  • ksh project ksh20120801

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • KornShell ksh

    • 20120801affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:11kshbefore 2020.0.0-2.12020.0.0-2.1
Debian:9kshbefore 93u+20120801-3.1+deb9u193u+20120801-3.1+deb9u1
openSUSE:Tumbleweedkshbefore 93vu-10.193vu-10.1
Red Hat:enterprise_linux:6::clientkshbefore 0:20120801-38.el6_100:20120801-38.el6_10
Red Hat:enterprise_linux:6::clientksh-debuginfobefore 0:20120801-38.el6_100:20120801-38.el6_10
Red Hat:enterprise_linux:7::clientkshbefore 0:20120801-140.el7_70:20120801-140.el7_7
Red Hat:enterprise_linux:7::clientksh-debuginfobefore 0:20120801-140.el7_70:20120801-140.el7_7
Red Hat:enterprise_linux:8::appstreamkshbefore 0:20120801-253.el8_10:20120801-253.el8_1
Red Hat:enterprise_linux:8::appstreamksh-debuginfobefore 0:20120801-253.el8_10:20120801-253.el8_1
Red Hat:enterprise_linux:8::appstreamksh-debugsourcebefore 0:20120801-253.el8_10:20120801-253.el8_1
Red Hat:rhel_aus:7.2::serverkshbefore 0:20120801-26.el7_20:20120801-26.el7_2
Red Hat:rhel_aus:7.2::serverksh-debuginfobefore 0:20120801-26.el7_20:20120801-26.el7_2
Red Hat:rhel_aus:7.3::serverkshbefore 0:20120801-27.el7_30:20120801-27.el7_3
Red Hat:rhel_aus:7.3::serverksh-debuginfobefore 0:20120801-27.el7_30:20120801-27.el7_3
Red Hat:rhel_aus:7.4::serverkshbefore 0:20120801-36.el7_40:20120801-36.el7_4
Red Hat:rhel_aus:7.4::serverksh-debuginfobefore 0:20120801-36.el7_40:20120801-36.el7_4
Red Hat:rhel_e4s:8.0::appstreamkshbefore 0:20120801-253.el8_00:20120801-253.el8_0
Red Hat:rhel_e4s:8.0::appstreamksh-debuginfobefore 0:20120801-253.el8_00:20120801-253.el8_0
Red Hat:rhel_e4s:8.0::appstreamksh-debugsourcebefore 0:20120801-253.el8_00:20120801-253.el8_0
Red Hat:rhel_eus:7.5::computenodekshbefore 0:20120801-138.el7_50:20120801-138.el7_5
Red Hat:rhel_eus:7.5::computenodeksh-debuginfobefore 0:20120801-138.el7_50:20120801-138.el7_5
Red Hat:rhel_eus:7.6::computenodekshbefore 0:20120801-140.el7_60:20120801-140.el7_6
Red Hat:rhel_eus:7.6::computenodeksh-debuginfobefore 0:20120801-140.el7_60:20120801-140.el7_6
SUSE:Linux Enterprise Module for Legacy 12kshbefore 93vu-19.3.293vu-19.3.2

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:ksh2020.0.0-2.1 · Debian:11Package registry (OSV)
opensuse:ksh93vu-10.1 · openSUSE:TumbleweedPackage registry (OSV)
red hat:ksh0:20120801-253.el8_0 · Red Hat:rhel_e4s:8.0::appstreamPackage registry (OSV)
red hat:ksh-debuginfo0:20120801-253.el8_0 · Red Hat:rhel_e4s:8.0::appstreamPackage registry (OSV)
red hat:ksh-debugsource0:20120801-253.el8_0 · Red Hat:rhel_e4s:8.0::appstreamPackage registry (OSV)
suse:ksh93vu-19.3.2 · SUSE:Linux Enterprise Module for Legacy 12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-77 · Improper Neutralization of Special Elements used in a Command ('Command Injection')

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (4 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records