CVE-2019-20373 Information

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.

CVSS Vector

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

Reference

https://git.launchpad.net/~ltsp-upstream/ltsp/+git/ldm/commit/?id=c351ac69ef63ed6c84221cef73e409059661b8ba https://lists.debian.org/debian-lts-announce/2020/01/msg00007.html https://www.debian.org/security/2020/dsa-4601

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8