CVE-2020-1712

MEDIUM

Description

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.

References

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1712

https://github.com/systemd/systemd/commit/1068447e6954dc6ce52f099ed174c442cb89ed54

https://github.com/systemd/systemd/commit/637486261528e8aa3da9f26a4487dc254f4b7abb

https://github.com/systemd/systemd/commit/bc130b6858327b382b07b3985cf48e2aa9016b2d

https://github.com/systemd/systemd/commit/ea0d0ede03c6f18dbc5036c5e9cccf97e415ccc2

https://www.openwall.com/lists/oss-security/2020/02/05/1

Details

Source: MITRE

Published: 2020-03-31

Updated: 2020-04-10

Type: CWE-416

Risk Information

CVSS v2.0

Base Score: 4.6

Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 3.9

Severity: MEDIUM

CVSS v3.0

Base Score: 7.8

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 1.8

Severity: HIGH