high7.5
CVE-2021-43411
An issue was discovered in GNU Hurd before 0.9 20210404-9.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Gnu | Hurd | before 0.9.20210404-9 |
Weakness classification
References
- NVD record
- CVE.org record
- 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%40gnu.org/msg32112.html
- 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%40gnu.org/msg32112.html