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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 priv...
CVE-2021-43414 · published 4 years ago
Summary
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.
What to do
- Update gnu hurd to version 0.9.20210404-9 or later.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| gnu | hurd |
< 0.9.20210404-9 cpe:2.3:a:gnu:hurd:*:*:*:*:*:*:*:* |
Original advisory text
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 priv...
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.
References
- https://lists.gnu.org/archive/html/bug-hurd/2021-05/msg00079.html Exploit Mailing List Vendor Advisory
- https://www.mail-archive.com/bug-hurd%40gnu.org/msg32114.html
Internet-facing
14 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit (estimated)
- Gives an attacker full control (estimated)
Type
CWE-287Improper Authentication
Timeline
Published7 Nov 2021
Updated3 Nov 2026
First seen29 Sep 2026
Sources
CVE-2021-43414 · NVD
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