Is CVE-2019-3843 in the CISA KEV catalog?

No. CVE-2019-3843 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-3843?

CVE-2019-3843 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2019-3843?

CVE-2019-3843 has an EPSS score of 0.91% (56th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-3843?

Upgrade systemd on debian 11 to 242-4 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2019-3843

HIGH

7.8

CVSS v3

NVD

Description

It was discovered that a systemd service that uses DynamicUser property can create a SUID/SGID binary that would be allowed to run as the transient service UID/GID even after the service is terminated. A local attacker may use this flaw to access resources that will be owned by a potentially different service in the future, when the UID/GID will be recycled.

CWE-266 CWE-269Improper Privilege Management

How to fix

Remediation Available

systemdDebian

Fixed in:242-4CVE-2019-3843

systemdUbuntu

Fixed in:229-4ubuntu21.27USN-4269-1

Fixed in:237-3ubuntu10.38USN-4269-1

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 VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.91%probability of exploitation in 30 days

56thpercentile

Moderate risk: more likely to be exploited than 56% of all known CVEs.

References

Patch1

bugzilla.redhat.com

Third-Party Advisory3

Other references3

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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.