Auth bypass in GNU Hurd
CVE-2021-43414
An issue was discovered in GNU Hurd before 0.9 20210404-9. The use of an authentication protocol in the proc server is vulnerable to man-in-the-middle attacks, which can be exploited for local privilege escalation to get full root access.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (19.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 19.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · 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/msg32114.html
Frequently asked questions
- What is CVE-2021-43414?
- CVE-2021-43414 is a high-severity vulnerability in GNU Hurd, classified under Improper Authentication. CVSS score: 7.0/10. Published 2021-11-07.
- How severe is CVE-2021-43414?
- High severity. CVSS v3 base score is 7.0 out of 10.