CVE-2019-3842
CVE-2019-3842
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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 4.5 · Medium · EPSS 1.2% · Public exploit · Fix available
- Published
- Updated
Stack: system
Affected products and versions
systemd
- Versions
- v242-rc4: Affected
No fix published
systemd Debian:12
- Affected ranges
- ECOSYSTEM: < 241-3
Update to 241-3
systemd Debian:13
- Affected ranges
- ECOSYSTEM: < 241-3
Update to 241-3
systemd Debian:14
- Affected ranges
- ECOSYSTEM: < 241-3
Update to 241-3
systemd Ubuntu:14.04:LTS
- Versions
- 204-0ubuntu18
- 204-0ubuntu19
- 204-5ubuntu3
- 204-5ubuntu5
- 204-5ubuntu6
- 204-5ubuntu7
- 204-5ubuntu8
- 204-5ubuntu9
- 204-5ubuntu10
- 204-5ubuntu11
- 204-5ubuntu13
- 204-5ubuntu14
- 204-5ubuntu15
- 204-5ubuntu16
- 204-5ubuntu17
- 204-5ubuntu18
- 204-5ubuntu19
- 204-5ubuntu20
- 204-5ubuntu20.2
- 204-5ubuntu20.3
- 204-5ubuntu20.4
- 204-5ubuntu20.5
- 204-5ubuntu20.6
- 204-5ubuntu20.7
- 204-5ubuntu20.8
- 204-5ubuntu20.9
- 204-5ubuntu20.10
- 204-5ubuntu20.11
- 204-5ubuntu20.12
- 204-5ubuntu20.13
- 204-5ubuntu20.14
- 204-5ubuntu20.15
- 204-5ubuntu20.18
- 204-5ubuntu20.19
- 204-5ubuntu20.20
- 204-5ubuntu20.21
- 204-5ubuntu20.22
- 204-5ubuntu20.24
- 204-5ubuntu20.25
- 204-5ubuntu20.26
- 204-5ubuntu20.28
- 204-5ubuntu20.29
- Affected ranges
- ECOSYSTEM: < 204-5ubuntu20.31
Update to 204-5ubuntu20.31
systemd Ubuntu:16.04:LTS
- Versions
- 225-1ubuntu9
- 227-2ubuntu1
- 227-2ubuntu2
- 228-1ubuntu2
- 228-2ubuntu1
- 228-2ubuntu2
- 228-3ubuntu1
- 228-4ubuntu1
- 228-4ubuntu2
- 228-5ubuntu1
- 228-5ubuntu2
- 228-5ubuntu3
- 228-6ubuntu1
- 229-1ubuntu2
- 229-1ubuntu4
- 229-2ubuntu1
- 229-3ubuntu1
- 229-3ubuntu2
- 229-4ubuntu1
- 229-4ubuntu4
- 229-4ubuntu5
- 229-4ubuntu6
- 229-4ubuntu7
- 229-4ubuntu8
- 229-4ubuntu10
- 229-4ubuntu11
- 229-4ubuntu12
- 229-4ubuntu13
- 229-4ubuntu16
- 229-4ubuntu17
- 229-4ubuntu19
- 229-4ubuntu20
- 229-4ubuntu21
- 229-4ubuntu21.1
- 229-4ubuntu21.2
- 229-4ubuntu21.3
- 229-4ubuntu21.4
- 229-4ubuntu21.5
- 229-4ubuntu21.6
- 229-4ubuntu21.8
- 229-4ubuntu21.9
- 229-4ubuntu21.10
- 229-4ubuntu21.15
- 229-4ubuntu21.16
- 229-4ubuntu21.17
- 229-4ubuntu21.19
- Affected ranges
- ECOSYSTEM: < 229-4ubuntu21.21
Update to 229-4ubuntu21.21
systemd Ubuntu:18.04:LTS
- Versions
- 234-2ubuntu12
- 235-2ubuntu3
- 235-3ubuntu2
- 235-3ubuntu3
- 237-3ubuntu3
- 237-3ubuntu4
- 237-3ubuntu6
- 237-3ubuntu7
- 237-3ubuntu8
- 237-3ubuntu10
- 237-3ubuntu10.2
- 237-3ubuntu10.3
- 237-3ubuntu10.4
- 237-3ubuntu10.6
- 237-3ubuntu10.9
- 237-3ubuntu10.11
- 237-3ubuntu10.12
- 237-3ubuntu10.13
- 237-3ubuntu10.15
- 237-3ubuntu10.17
- Affected ranges
- ECOSYSTEM: < 237-3ubuntu10.19
Update to 237-3ubuntu10.19
Original sources
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3842
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/STR36RJE4ZZIORMDXRERVBHMPRNRTHAC/
- https://www.exploit-db.com/exploits/46743/
- http://packetstormsecurity.com/files/152610/systemd-Seat-Verification-Active-Session-Spoofing.html
- https://lists.debian.org/debian-lts-announce/2019/04/msg00022.html
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00062.html
- https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
- https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
- https://nvd.nist.gov/vuln/detail/CVE-2019-3842