CVE-2020-1712
Published: 5 February 2020
A heap use-after-free vulnerability was found in systemd before version v245-rc1, where asynchronous Polkit queries are performed while handling dbus messages. A local unprivileged attacker can abuse this flaw to crash systemd services or potentially execute code and elevate their privileges, by sending specially crafted dbus messages.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
systemd Launchpad, Ubuntu, Debian |
bionic |
Released
(237-3ubuntu10.38)
|
| eoan |
Released
(242-7ubuntu3.6)
|
|
| focal |
Released
(244.1-0ubuntu3)
|
|
| groovy |
Released
(244.1-0ubuntu3)
|
|
| hirsute |
Released
(244.1-0ubuntu3)
|
|
| impish |
Released
(244.1-0ubuntu3)
|
|
| jammy |
Released
(244.1-0ubuntu3)
|
|
| kinetic |
Released
(244.1-0ubuntu3)
|
|
| lunar |
Released
(244.1-0ubuntu3)
|
|
| mantic |
Released
(244.1-0ubuntu3)
|
|
| trusty |
Needed
|
|
| upstream |
Needs triage
|
|
| xenial |
Released
(229-4ubuntu21.27)
|
|
|
Patches: upstream: https://github.com/poettering/systemd/commits/polkit-ref-count upstream: https://github.com/systemd/systemd/commit/ea0d0ede03c6f18dbc5036c5e9cccf97e415ccc2 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.8 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |