CVE-2021-43411: Race Condition
First published: Sun Nov 07 2021(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| GNU Hurd | <0.9.20210404-9 |
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Reference Links
- https://lists.gnu.org/archive/html/bug-hurd/2021-05/msg00079.html
- https://salsa.debian.org/hurd-team/hurd/-/blob/4d1b079411e2f40576e7b58f9b5b78f733a2beda/debian/patches/0034-proc-Use-UIDs-for-evaluating-permissions.patch
- https://www.mail-archive.com/bug-hurd@gnu.org/msg32112.html
- https://www.mail-archive.com/bug-hurd%40gnu.org/msg32112.html
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