Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gnu | Hurd | < 0.9.20210404-9 |
Related Weaknesses (CWE)
References
- https://lists.gnu.org/archive/html/bug-hurd/2021-05/msg00079.htmlExploitMailing ListVendor Advisory
- https://salsa.debian.org/hurd-team/hurd/-/blob/4d1b079411e2f40576e7b58f9b5b78f73Mailing ListPatchThird Party Advisory
- https://www.mail-archive.com/bug-hurd%40gnu.org/msg32112.html
- https://lists.gnu.org/archive/html/bug-hurd/2021-05/msg00079.htmlExploitMailing ListVendor Advisory
- https://salsa.debian.org/hurd-team/hurd/-/blob/4d1b079411e2f40576e7b58f9b5b78f73Mailing ListPatchThird Party Advisory
- https://www.mail-archive.com/bug-hurd%40gnu.org/msg32112.html
FAQ
What is CVE-2021-43411?
CVE-2021-43411 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 ol...
How severe is CVE-2021-43411?
CVE-2021-43411 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-43411?
Check the references section above for vendor advisories and patch information. Affected products include: Gnu Hurd.