CVE-2019-20373

Name: CVE-2019-20373
Creator: NVD / NIST
Published: 2020-01-09T23:15:10.29+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.43%

Last modified Jun 17, 2026

CVE-2019-20373 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. LTSP LDM through 2.18.06 allows fat-client root access because the LDM_USERNAME variable may have an empty value if the user's shell lacks support for Bourne shell syntax. This is related to a run-x-session script.. EPSS estimates a 0.43% chance of exploitation in the next 30 days.

Description

LTSP LDM through 2.18.06 allows fat-client root access because the LDM_USERNAME variable may have an empty value if the user's shell lacks support for Bourne shell syntax. This is related to a run-x-session script.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

0.43%

34.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0
Ltsp	Ldm	<= 2.18.06

References

https://git.launchpad.net/~ltsp-upstream/ltsp/+git/ldm/commit/?id=c351ac69ef63ed6c84221cef73e409059661b8baPatch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/01/msg00007.htmlMailing List, Patch, Third Party Advisory
https://www.debian.org/security/2020/dsa-4601Third Party Advisory
https://git.launchpad.net/~ltsp-upstream/ltsp/+git/ldm/commit/?id=c351ac69ef63ed6c84221cef73e409059661b8baPatch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/01/msg00007.htmlMailing List, Patch, Third Party Advisory
https://www.debian.org/security/2020/dsa-4601Third Party Advisory

Timeline

Published: Jan 9, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-20373?

How severe is CVE-2019-20373?

CVE-2019-20373 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.43% probability of exploitation in the next 30 days.

How do I fix CVE-2019-20373?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-20373?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST