Vulnerability in Canonical Ltd. Apport
CVE-2021-3899
There is a race condition in the 'replaced executable' detection that, with the correct local configuration, allow an attacker to execute arbitrary code as root.
Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)
EPSS: 0.004 (30.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Canonical Ltd. Apport — versions 0
- Canonical Apport
- Canonical Ubuntu_linux — versions 18.04, 20.04, 21.10
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@ubuntu.com (issue-tracking, Patch, Issue Tracking)
- security@ubuntu.com (vendor-advisory, Vendor Advisory)
- security@ubuntu.com (issue-tracking, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-3899?
- CVE-2021-3899 is a high-severity vulnerability in Canonical Ltd. Apport, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 7.8/10. Published 2024-06-03.
- How severe is CVE-2021-3899?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2021-3899 known to be exploited?
- 9 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.