National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2019-3842 Detail

Current 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".

Source:  MITRE
View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score: 7.0 HIGH
Vector:  CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Nist CVSS score does not match with CNA score
CNA:  Red Hat, Inc.
Base Score: 4.5 MEDIUM
Vector:  CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00062.html
http://packetstormsecurity.com/files/152610/systemd-Seat-Verification-Active-Session-Spoofing.html Exploit Third Party Advisory VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3842 Issue Tracking Vendor Advisory
https://lists.debian.org/debian-lts-announce/2019/04/msg00022.html Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/STR36RJE4ZZIORMDXRERVBHMPRNRTHAC/ Mailing List Release Notes Third Party Advisory
https://www.exploit-db.com/exploits/46743/ Exploit Third Party Advisory VDB Entry

Weakness Enumeration

CWE-ID CWE Name Source
CWE-264 Permissions, Privileges, and Access Controls NIST  
CWE-285 Improper Authorization Red Hat, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
241
 cpe:2.3:a:systemd_project:systemd:242:rc1:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:systemd_project:systemd:242:rc2:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:systemd_project:systemd:242:rc3:*:*:*:*:*:*
     Show Matching CPE(s)

Configuration 2 ( hide )
 cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
     Show Matching CPE(s)

Configuration 3 ( hide )
 cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
     Show Matching CPE(s)

Configuration 4 ( hide )
 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

8 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-3842
NVD Published Date:
04/09/2019
NVD Last Modified:
05/27/2019