Is CVE-2021-43413 in the CISA KEV catalog?

No. CVE-2021-43413 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-43413?

CVE-2021-43413 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2021-43413?

CVE-2021-43413 has an EPSS score of 1.91% (77th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-43413?

Upgrade hurd on debian unstable to 1:0.9.git20210404-9 or later.

CVE & CISA-KEV Catalog

CVE-2021-43413

HIGHEPSS 77th pctl

8.8

CVSS v3

NVD

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.

How to fix

Remediation Available

hurdDebian

Fixed in:1:0.9.git20210404-9CVE-2021-43413

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

1.91%probability of exploitation in 30 days

77thpercentile

Elevated risk: more likely to be exploited than 77% of all known CVEs.

References

Exploit1

lists.gnu.org

Vendor Advisory2

Other references1

mail-archive.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.