SB2025102156 - Debian update for lxd
Published: October 21, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) Cross-site request forgery (CVE-ID: CVE-2025-54286)
The vulnerability allows a remote attacker to perform cross-site request forgery attacks.
The vulnerability exists due to insufficient validation of the HTTP request origin when using client certificate authentication with LXD-UI. A remote attacker can trick the victim to visit a specially crafted web page and perform arbitrary actions on behalf of the victim on the vulnerable website.
2) Template injection (CVE-ID: CVE-2025-54287)
The vulnerability allows a remote user to read arbitrary files on the system.
The vulnerability exists due to improper input validation within the snapshot creation functionality of the Pongo2 template engine in LXD-UI. A remote user with permissions to modify instance settings can pass specially crafted input to the application and read arbitrary files on the system.
Payload example:
{% filter urlencode|slice:":100" %}{% include "/etc/passwd" %}{%endfilter %}
3) Spoofing attack (CVE-ID: CVE-2025-54288)
The vulnerability allows a remote user to perform spoofing attack.
The vulnerability exists due to the source container identification process in devLXD server uses process cmdline (command line) information when displaying process names. A remote user can use the "exec -a" command to spoof process name and impersonate another container.
4) Path traversal (CVE-ID: CVE-2025-54293)
The vulnerability allows a remote user to perform directory traversal attacks.
The vulnerability exists due to input validation error when processing directory traversal sequences within the validLogFileName() function in lxd/instance_logs.go. A remote user can send a specially crafted HTTP request and read arbitrary files on the system.
Remediation
Install update from vendor's website.