CVE-2019-3842

Common vulnerabilities & exposures (CVE)

CVE database CVE database blogpost Release & EoL database

Published at: - 09-04-2019 11:29

Last modified: - 31-01-2022 07:51

Total changes: - 4

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".

Common Vulnerability Scoring System (CVSS)

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

High

Attack complexity

Local

Attack vector

High

Availability

High

Confidentiality

High

Integrity

Low

Privileges required

Unchanged

Scope

None

User interaction

7.0

Base score

1.0

5.9

Exploitability score

Impact score

Verification logic

vendor=systemd_project AND product=systemd AND version=242 AND update=rc1

vendor=systemd_project AND product=systemd AND version=242 AND update=rc2

vendor=systemd_project AND product=systemd AND version=242 AND update=rc3

vendor=systemd_project AND product=systemd AND versionEndIncluding=241

vendor=Red Hat Enterprise Linux AND product=enterprise_linux AND version=7.0

vendor=fedoraproject AND product=fedora AND version=30

vendor=Debian AND product=debian_linux AND version=8.0

Reference

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3842
FEDORA-2019-3fa5db9e19-Mailing List, Release Notes, Third Party Advisory
46743-Exploit, Third Party Advisory, VDB Entry
http://packetstormsecurity.com/files/152610/systemd-Seat-Verification-Active-Session-Spoofing.html
[debian-lts-announce] 20190424 [SECURITY] [DLA 1762-1] systemd security update-Third Party Advisory
openSUSE-SU-2019:1450-Third Party Advisory
[bookkeeper-issues] 20210628 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8-Third Party Advisory
[bookkeeper-issues] 20210629 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8-Third Party Advisory

Keywords

CVE-2019-3842

Common vulnerabilities & exposures (CVE)

Description

Common Vulnerability Scoring System (CVSS)

Verification logic

Reference

NVD

CVE-2019-3842

CVE

Common vulnerabilities & exposures

CVSS

Common vulnerability scoring system

Security

Vulnerabilities

Exposures