Description (CNA)
An information disclosure vulnerability exists in Canonical ubuntu-pro-client (formerly ubuntu-advantage-tools). The client validates Ubuntu Pro APT credentials by executing /usr/lib/apt/apt-helper using the download-file command. During this process, the secret bearer token is embedded directly in the cleartext URL component passed via the command-line arguments (argv), resulting in a URL format such as https://bearer:<token>@esm.ubuntu.com/.../. On systems utilizing a default-mounted /proc file system where process-hiding mitigations (such as hidepid) are disabled, an unprivileged local attacker can monitor system processes and read the sensitive bearer token directly from /proc/cmdline while the helper process is actively running. This leaked token can subsequently be used to gain unauthorized access to the victim's Ubuntu Pro or Expanded Security Maintenance (ESM) repositories.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Canonical / ubuntu-pro-client (ubuntu-advantage-tools) | affected 0 before 37.3 |
| Canonical / Ubuntu 26.04 LTS | unaffected 37.2ubuntu0.1 |
| Canonical / Ubuntu 24.04 LTS | unaffected 37.2ubuntu~24.04.1 |
| Canonical / Ubuntu 22.04 LTS | unaffected 37.2ubuntu~22.04.1 |
| Canonical / Ubuntu 20.04 LTS | unaffected 37.1ubuntu0~20.04.1 |
| Canonical / Ubuntu 18.04 LTS | unaffected 37.1ubuntu0~18.04.1 |
| Canonical / Ubuntu 16.04 LTS | unaffected 37.1ubuntu0~16.04.1 |
| Canonical / Ubuntu 14.04 LTS | unaffected 19.7ubuntu0.1 |
CWE
CWE-214
References
ADP enrichment
No English description supplied.
No references supplied.