https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Tue, 06 Oct 2026 01:34:39 +0000 https://vulnerability.circl.lu/vuln/cve-2026-9494 <p><strong>Affected:</strong> Canonical ubuntu-pro-client (ubuntu-advantage-tools), Canonical Ubuntu 26.04 LTS, Canonical Ubuntu 24.04 LTS, Canonical Ubuntu 22.04 LTS, Canonical Ubuntu 20.04 LTS, Canonical Ubuntu 18.04 LTS, Canonical Ubuntu 16.04 LTS, Canonical Ubuntu 14.04 LTS</p> <p>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:&lt;token&gt;@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&#39;s Ubuntu Pro or Expanded Security Maintenance (ESM) repositories.</p> <p><strong>Affected:</strong> Canonical ubuntu-pro-client (ubuntu-advantage-tools), Canonical Ubuntu 26.04 LTS, Canonical Ubuntu 24.04 LTS, Canonical Ubuntu 22.04 LTS, Canonical Ubuntu 20.04 LTS, Canonical Ubuntu 18.04 LTS, Canonical Ubuntu 16.04 LTS, Canonical Ubuntu 14.04 LTS</p> <p>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:&lt;token&gt;@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&#39;s Ubuntu Pro or Expanded Security Maintenance (ESM) repositories.</p> https://vulnerability.circl.lu/vuln/cve-2026-9494 https://vulnerability.circl.lu/vuln/usn-8555-1 <p><strong>Affected:</strong> Ubuntu:14.04:LTS: ubuntu-advantage-tools, Ubuntu:16.04:LTS: ubuntu-advantage-tools, Ubuntu:18.04:LTS: ubuntu-advantage-tools, Ubuntu:20.04:LTS: ubuntu-advantage-tools, Ubuntu:22.04:LTS: ubuntu-advantage-tools, Ubuntu:24.04:LTS: ubuntu-advantage-tools, Ubuntu:26.04:LTS: ubuntu-advantage-tools</p> <p>Bilal Teke discovered that Ubuntu Advantage Tools exposed the Pro bearer token in command-line arguments when validating APT credentials. A local attacker could possibly use this issue to obtain sensitive information and gain unauthorized access to Ubuntu Pro repositories. (CVE-2026-9494)</p> <p>Frederick Jerusha discovered that Ubuntu Advantage Tools did not properly validate data received from the contract server when writing APT source files. An attacker could possibly use this issue to inject arbitrary APT configuration and execute arbitrary code. (CVE-2026-11386)</p> <p>Mateusz Gierblinski discovered that Ubuntu Advantage Tools did not properly handle symbolic links when collecting diagnostic logs. A local attacker could possibly use this issue to obtain sensitive information from files owned by the administrator. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-12391)</p> <p><strong>Affected:</strong> Ubuntu:14.04:LTS: ubuntu-advantage-tools, Ubuntu:16.04:LTS: ubuntu-advantage-tools, Ubuntu:18.04:LTS: ubuntu-advantage-tools, Ubuntu:20.04:LTS: ubuntu-advantage-tools, Ubuntu:22.04:LTS: ubuntu-advantage-tools, Ubuntu:24.04:LTS: ubuntu-advantage-tools, Ubuntu:26.04:LTS: ubuntu-advantage-tools</p> <p>Bilal Teke discovered that Ubuntu Advantage Tools exposed the Pro bearer token in command-line arguments when validating APT credentials. A local attacker could possibly use this issue to obtain sensitive information and gain unauthorized access to Ubuntu Pro repositories. (CVE-2026-9494)</p> <p>Frederick Jerusha discovered that Ubuntu Advantage Tools did not properly validate data received from the contract server when writing APT source files. An attacker could possibly use this issue to inject arbitrary APT configuration and execute arbitrary code. (CVE-2026-11386)</p> <p>Mateusz Gierblinski discovered that Ubuntu Advantage Tools did not properly handle symbolic links when collecting diagnostic logs. A local attacker could possibly use this issue to obtain sensitive information from files owned by the administrator. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-12391)</p> https://vulnerability.circl.lu/vuln/usn-8555-1