CVE-2020-1712 Information

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.

CVSS Vector

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

Reference

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

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8