CVE-2021-25683: apport improperly parses /proc/pid/stat

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% 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 the get_starttime() function in data/apport did not properly parse the /proc/pid/stat file from the kernel.

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

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