CVE-2019-20373
First published: Thu Jan 09 2020(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/ldm | 2:2.18.06-1+deb10u1 | |
| Debian Linux | =8.0 | |
| Debian Linux | =9.0 | |
| Debian Linux | =10.0 | |
| LTSP LDM | <=2.18.06 |
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Reference Links
- https://git.launchpad.net/~ltsp-upstream/ltsp/+git/ldm/commit/?id=c351ac69ef63ed6c84221cef73e409059661b8ba
- https://bugs.launchpad.net/ubuntu/+source/ldm/+bug/1839431
- https://security-tracker.debian.org/tracker/CVE-2019-20373
- https://lists.debian.org/debian-lts-announce/2020/01/msg00007.html
- https://www.debian.org/security/2020/dsa-4601
Frequently Asked Questions
What is the severity of CVE-2019-20373?
CVE-2019-20373 is considered a high-risk vulnerability due to its potential to allow root access to fat clients.
How do I fix CVE-2019-20373?
To fix CVE-2019-20373, upgrade to the patched version 2:2.18.06-1+deb10u1 or later for the ldm package.
Which systems are affected by CVE-2019-20373?
CVE-2019-20373 affects Debian Linux versions 8.0, 9.0, and 10.0, as well as LTSP LDM versions up to 2.18.06.
What causes the vulnerability in CVE-2019-20373?
CVE-2019-20373 is caused by the LDM_USERNAME variable potentially having an empty value in certain shell environments.
Can CVE-2019-20373 be exploited remotely?
Yes, CVE-2019-20373 can be exploited remotely, leading to unauthorized root access on vulnerable systems.
- collector/security-tracker-debian
- agent/type
- agent/remedy
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/severity
- agent/references
- agent/author
- agent/description
- agent/event
- agent/first-publish-date
- agent/source
- agent/tags
- agent/softwarecombine
- collector/nvd-index
- agent/software-canonical-lookup-request
- package-manager/debian
- vendor/debian
- canonical/debian linux
- version/debian linux/8.0
- version/debian linux/9.0
- version/debian linux/10.0
- vendor/ltsp
- canonical/ltsp ldm
- version/ltsp ldm/2.18.06