Is CVE-2019-3842 in the CISA KEV catalog?

No. CVE-2019-3842 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-3842?

CVE-2019-3842 has a CVSS v3 base score of 7.0 (HIGH).

What is the EPSS score for CVE-2019-3842?

CVE-2019-3842 has an EPSS score of 1.22% (65th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-3842?

Upgrade systemd on debian 11 to 241-3 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2019-3842

HIGH

7.0

CVSS v3

NVD

Description

In systemd before v242-rc4, it was discovered that pam_systemd does not properly sanitize the environment before using the XDG_SEAT variable. It is possible for an attacker, in some particular configurations, to set a XDG_SEAT environment variable which allows for commands to be checked against polkit policies using the "allow_active" element rather than "allow_any".

CWE-285 CWE-863Incorrect Authorization

How to fix

Remediation Available

systemdDebian

Fixed in:241-3CVE-2019-3842

libpam-systemdUbuntu

Fixed in:204-5ubuntu20.31USN-3938-1

Fixed in:229-4ubuntu21.21USN-3938-1

Fixed in:237-3ubuntu10.19USN-3938-1

systemdUbuntu

Fixed in:204-5ubuntu20.31USN-3938-1

Fixed in:229-4ubuntu21.21USN-3938-1

Fixed in:237-3ubuntu10.19USN-3938-1

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 ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.22%probability of exploitation in 30 days

65thpercentile

Moderate risk: more likely to be exploited than 65% of all known CVEs.

References

Exploit2

Third-Party Advisory3

Other references3

Related Vulnerabilities

Other CWE-285 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-29927	Critical	9.1	100%	-	Fix
CVE-2021-28799	Critical	10.0	78%	KEV + Ransom	Fix
CVE-2023-32707	High	8.8	74%	-	Fix
CVE-2023-48241	High	7.5	73%	-	Fix
CVE-2023-22480	High	7.3	67%	-	Fix
CVE-2022-3229	Critical	9.8	66%	-	-

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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.