CVE-2019-3842
Published: 8 April 2019
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".
Priority
Status
Package | Release | Status |
---|---|---|
systemd Launchpad, Ubuntu, Debian |
upstream |
Released
(241-3)
|
trusty |
Released
(204-5ubuntu20.31)
|
|
xenial |
Released
(229-4ubuntu21.21)
|
|
bionic |
Released
(237-3ubuntu10.19)
|
|
cosmic |
Released
(239-7ubuntu10.12)
|
|
Patches: upstream: https://github.com/systemd/systemd/commit/83d4ab55336ff8a0643c6aa627b31e351a24040a |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.0 |
Attack vector | Local |
Attack complexity | High |
Privileges required | Low |
User interaction | None |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | High |
Availability impact | High |
Vector | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |