CVE Vulnerability

CVE-2019-3842

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".

4.4 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 3.4 / Impact : 6.4

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

Scope

7 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 1 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3842 Issue Tracking Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/STR36RJE4ZZIORMDXRERVBHMPRNRTHAC/ Mailing List Release Notes
https://www.exploit-db.com/exploits/46743/ Exploit Third Party Advisory
http://packetstormsecurity.com/files/152610/systemd-Seat-Verification-Active-Session-Spoofing.html Exploit Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/04/msg00022.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00062.html Third Party Advisory
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4@%3Cissues.bookkeeper.apache.org%3E Third Party Advisory
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b@%3Cissues.bookkeeper.apache.org%3E Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:systemd_project:systemd:242:rc1:*:*:*:*:*:*
cpe:2.3:a:systemd_project:systemd:242:rc2:*:*:*:*:*:*
cpe:2.3:a:systemd_project:systemd:242:rc3:*:*:*:*:*:*
cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
Information

Published : 2019-04-09 09:29

Updated : 2022-01-31 06:51

NVD link : CVE-2019-3842

Mitre link : CVE-2019-3842

Products Affected
No products.
CWE
CWE-863