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CVE-2019-3842

Published: Apr 9, 2019

Modified: Jun 9, 2025

PUBLISHED

CVSS v3.0

4.5

MEDIUM

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".

Vendor	Product	Versions
The systemd Project	systemd	affected `v242-rc4`

Weaknesses (CWE)

CVSS v3.0 Details

CVSS v3.0 Vector

CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

References

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3842

x_refsource_CONFIRM

FEDORA-2019-3fa5db9e19

vendor-advisory

x_refsource_FEDORA

exploit

x_refsource_EXPLOIT-DB

http://packetstormsecurity.com/files/152610/systemd-Seat-Verification-Active-Session-Spoofing.html

x_refsource_MISC

[debian-lts-announce] 20190424 [SECURITY] [DLA 1762-1] systemd security update

mailing-list

x_refsource_MLIST

openSUSE-SU-2019:1450

vendor-advisory

x_refsource_SUSE

[bookkeeper-issues] 20210628 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8

mailing-list

x_refsource_MLIST

[bookkeeper-issues] 20210629 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8

mailing-list

x_refsource_MLIST

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