CVE-2021-43413

Public Exploit

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.

8.8

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 1.03% Top 25%

Vendor Advisory gnu.org Vendor Advisory gnu.org Vendor Advisory gnu.org

Affected: n/a n/a

References

Link	Tags
https://lists.gnu.org/archive/html/bug-hurd/2021-05/msg00079.html	mailing list exploit vendor advisory
https://www.mail-archive.com/bug-hurd%40gnu.org/msg32113.html
https://lists.gnu.org/archive/html/bug-hurd/2002-11/msg00263.html	mailing list vendor advisory
https://lists.gnu.org/archive/html/bug-hurd/2005-06/msg00191.html	mailing list vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-43413?: CVE-2021-43413 has been scored as a high severity vulnerability.
How to fix CVE-2021-43413?: To fix CVE-2021-43413, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-43413 being actively exploited in the wild?: It is possible that CVE-2021-43413 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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