| Name | CVE-2019-3844 |
| Description | It was discovered that a systemd service that uses DynamicUser property can get new privileges through the execution of SUID binaries, which would allow to create binaries owned by the service transient group with the setgid bit set. A local attacker may use this flaw to access resources that will be owned by a potentially different service in the future, when the GID will be recycled. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 928102 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| systemd (PTS) | bullseye | 247.3-7+deb11u5 | fixed |
| bullseye (security) | 247.3-7+deb11u6 | fixed |
| bookworm | 252.31-1~deb12u1 | fixed |
| trixie | 256.7-3 | fixed |
| sid | 257~rc2-3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| systemd | source | experimental | 242-1 | | | |
| systemd | source | jessie | (not affected) | | | |
| systemd | source | (unstable) | 242-4 | | | 928102 |
Notes
[buster] - systemd <ignored> (Minor issue; exploit vector needs control both of the service and a helper outside)
[stretch] - systemd <ignored> (Minor issue; exploit vector needs control both of the service and a helper outside)
[jessie] - systemd <not-affected> (Vulnerable code introduced later)
https://bugzilla.redhat.com/show_bug.cgi?id=1684610
https://github.com/systemd/systemd/commit/bf65b7e0c9fc215897b676ab9a7c9d1c688143ba
https://bugs.chromium.org/p/project-zero/issues/detail?id=1771
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1814596