Vulnerability in GNU Hurd
CVE-2021-43411
An issue was discovered in GNU Hurd before 0.9 20210404-9. When trying to exec a setuid executable, there's a window of time when the process already has the new privileges, but still refers to the old task and is accessible through the old process port. This can be exploited to get full root access.
Vulnerability class: Race Condition
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.013 (68.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 68.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.013 · change: +0.000
Affected products
Weakness classification (CWE)
References
- lists.gnu.org/archive/html/bug-hurd/2021-05/msg00079.html (Exploit, Mailing List, Vendor Advisory)
- www.mail-archive.com/bug-hurd@gnu.org/msg32112.html
- salsa.debian.org/hurd-team/hurd/-/blob/4d1b079411e2f40576e7b58f9b5b78f733a2beda… (Patch, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-43411?
- CVE-2021-43411 is a high-severity vulnerability in GNU Hurd, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 7.5/10. Published 2021-11-07.
- How severe is CVE-2021-43411?
- High severity. CVSS v3 base score is 7.5 out of 10.