Use After Free Affecting systemd package, versions <244.1-0ubuntu3
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Test your applications- Snyk ID SNYK-UBUNTU2004-SYSTEMD-578400
- published 5 Feb 2020
- disclosed 31 Mar 2020
Introduced: 5 Feb 2020
CVE-2020-1712 Open this link in a new tabHow to fix?
Upgrade Ubuntu:20.04 systemd to version 244.1-0ubuntu3 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream systemd package and not the systemd package as distributed by Ubuntu.
See How to fix? for Ubuntu:20.04 relevant fixed versions and status.
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
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2020-1712
- https://security-tracker.debian.org/tracker/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
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1712
- https://lists.debian.org/debian-lts-announce/2022/06/msg00025.html