High severity · published Nov 7, 2021
CVE-2021-43413
An issue was discovered in GNU Hurd before 0.9 20210404-9
8.8
CVSS
2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.0% · higher than 80% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HU
Hurd · Gnu
before 0.9.20210404-9 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-43413
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-43413
Mailing List
https://lists.gnu.org/archive/html/bug-hurd/2002-11/msg00263.html
Mailing List
https://lists.gnu.org/archive/html/bug-hurd/2005-06/msg00191.html
Exploit
https://lists.gnu.org/archive/html/bug-hurd/2021-05/msg00079.html
www.mail-archive.com
https://www.mail-archive.com/bug-hurd%40gnu.org/msg32113.html
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