CVE-2019-3842

Severity

44%

Complexity

34%

Confidentiality

106%

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".

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".

CVSS 3.0 Base Score 7. CVSS Attack Vector: local. CVSS Attack Complexity: high. CVSS Vector: (CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H).

CVSS 2.0 Base Score 4.4. CVSS Attack Vector: local. CVSS Attack Complexity: medium. CVSS Vector: (AV:L/AC:M/Au:N/C:P/I:P/A:P).

Overview

First reported 5 years ago

2019-04-09 21:29:00

Last updated 5 years ago

2019-05-28 00:29:00

Affected Software

Red Hat Enterprise Linux (RHEL) 7.0 (7)

7.0

Fedora 30

30

Debian Linux 8.0 (Jessie)

8.0

References

openSUSE-SU-2019:1450

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

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

Third Party Advisory

FEDORA-2019-3fa5db9e19

Mailing List, Release Notes, Third Party Advisory

46743

Exploit, Third Party Advisory, VDB Entry

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