CVE-2021-43413
An issue was discovered in GNU Hurd before 0.9 20210404-9. A single pager port is shared among...
An issue was discovered in GNU Hurd before 0.9 20210404-9. A single pager port is shared among everyone who mmaps a file, allowing anyone to modify any files that they can read. This can be trivially exploited to get full root access.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
An issue was discovered in GNU Hurd before 0.9 20210404-9. A single pager port is shared among everyone who mmaps a file, allowing anyone to modify any files that they can read. This can be trivially exploited to get full root access.
- Record
CVE-2021-43413- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 9.0 High
AV:N/AC:L/Au:S/C:C/I:C/A:C - Updated
- 2026-11-02
CVE List No score
An issue was discovered in GNU Hurd before 0.9 20210404-9. A single pager port is shared among everyone who mmaps a file, allowing anyone to modify any files that they can read. This can be trivially exploited to get full root access.
- Record
CVE-2021-43413- Updated
- 2026-11-02
EUVDEUVD-2021-30348 No score
An issue was discovered in GNU Hurd before 0.9 20210404-9. A single pager port is shared among everyone who mmaps a file, allowing anyone to modify any files that they can read. This can be trivially exploited to get full root access.
- Record
EUVD-2021-30348- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-4gqc-53g7-25x6 No score
An issue was discovered in GNU Hurd before 0.9 20210404-9. A single pager port is shared among...
An issue was discovered in GNU Hurd before 0.9 20210404-9. A single pager port is shared among everyone who mmaps a file, allowing anyone to modify any files that they can read. This can be trivially exploited to get full root access.
- Record
GHSA-4gqc-53g7-25x6- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-43413 is a high vulnerability (CVSS 8.8) in Gnu Hurd, published November 7, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.97%, the 80th percentile. No source names a fixed version.
References
lists.gnu.org/archive/html/bug-hurd/2021-05/msg00079.html
mail-archive.com/bug-hurd%40gnu.org/msg32113.html
nvd.nist.gov/vuln/detail/CVE-2021-43413
github.com/advisories/GHSA-4gqc-53g7-25x6