What’s Vulnerable › Vulnerabilities

CVE-2021-3709: Apport file permission bypass through emacs byte compilation errors

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-10-01 · updated 2026-06-17
• Weakness: CWE-538

Description

Function check_attachment_for_errors() in file data/general-hooks/ubuntu.py could be tricked into exposing private data via a constructed crash file. This issue affects: apport 2.14.1 versions prior to 2.14.1-0ubuntu3.29+esm8; 2.20.1 versions prior to 2.20.1-0ubuntu2.30+esm2; 2.20.9 versions prior to 2.20.9-0ubuntu7.26; 2.20.11 versions prior to 2.20.11-0ubuntu27.20; 2.20.11 versions prior to 2.20.11-0ubuntu65.3;

Affected products

• Canonical apport: 2.14.1-0ubuntu1, 2.14.1-0ubuntu2, 2.14.1-0ubuntu3, 2.14.1-0ubuntu3.1, 2.14.1-0ubuntu3.2, 2.14.1-0ubuntu3.3 (+164)

References

• https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1934308
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3709
• https://ubuntu.com/security/notices/USN-5077-1
• https://ubuntu.com/security/notices/USN-5077-2
• https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1934308
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3709
• https://ubuntu.com/security/notices/USN-5077-1
• https://ubuntu.com/security/notices/USN-5077-2

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