What’s Vulnerable › Vulnerabilities

CVE-2021-25684: apport can be stalled by reading a FIFO

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-06-11 · updated 2026-06-17
• Weakness: CWE-20

Description

It was discovered that apport in data/apport did not properly open a report file to prevent hanging reads on a FIFO.

Affected products

• Canonical apport: from 2.20.1-0ubuntu1 before 2.20.1-0ubuntu2.30; from 2.20.9-0ubuntu1 before 2.20.9-0ubuntu7.23; from 2.20.11-0ubuntu27 before 2.20.11-0ubuntu27.16; from 2.20.11-0ubuntu50 before 2.20.11-0ubuntu50.5 — fixed in 2.20.1-0ubuntu2.30, 2.20.11-0ubuntu27.16, 2.20.11-0ubuntu50.5, 2.20.9-0ubuntu7.23

How to fix

Upgrade to a fixed version: Canonical apport 2.20.1-0ubuntu2.30, 2.20.11-0ubuntu27.16, 2.20.11-0ubuntu50.5, 2.20.9-0ubuntu7.23. Check the vendor advisory for mitigations.

References

• https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1912326
• http://seclists.org/fulldisclosure/2025/Jun/9
• https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1912326

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