CCE-95710-0| Platform: cpe:/o:ubuntu:ubuntu_linux:20.04, cpe:/o:ubuntu:ubuntu_linux:22.04, cpe:/o:ubuntu:ubuntu_linux:23.04 | Date: (C)2023-07-04 (M)2023-09-01 |
X Display Manager Control Protocol (XDMCP) is designed to provide authenticated access to display management services for remote displays.
Rationale:
XDMCP is inherently insecure.
1. XDMCP is not a ciphered protocol. This may allow an attacker to capture keystrokes entered by a user
2. XDMCP is vulnerable to man-in-the-middle attacks. This may allow an attacker to steal the credentials of legitimate users by impersonating the XDMCP server.
Fix:
Edit the file /etc/gdm3/custom.conf and remove the line: Enable=true
Parameter:
[yes/no]
Technical Mechanism:
Edit the file /etc/gdm3/custom.conf and remove the line: Enable=true
| CCSS Severity: | CCSS Metrics: |
| CCSS Score : 6.4 | Attack Vector: ADJACENT_NETWORK |
| Exploit Score: 1.6 | Attack Complexity: HIGH |
| Impact Score: 4.7 | Privileges Required: NONE |
| Severity: MEDIUM | User Interaction: NONE |
| Vector: AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:L | Scope: UNCHANGED |
| | Confidentiality: HIGH |
| | Integrity: LOW |
| | Availability: LOW |
| | |
References: | Resource Id | Reference |
|---|
| SCAP Repo OVAL Definition | oval:org.secpod.oval:def:92354 |
| SCAP Repo OVAL Definition | oval:org.secpod.oval:def:89583 |
| SCAP Repo OVAL Definition | oval:org.secpod.oval:def:90441 |
