CVE-2020-1712

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 breakdown

Affected products

• Debian / debian_linux9.0 – 9.0
• RedHat / ceph_storage4.0 – 4.0
• RedHat / discovery
• RedHat / enterprise_linux8.0 – 8.0
• RedHat / migration_toolkit1.0 – 1.0
• RedHat / openshift_container_platform4.0 – 4.0
• systemd_project / systemd244
• Unknown / systemdbefore v245-rc1 – before v245-rc1

References

• MISChttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1712
• MAILING_LISThttps://www.openwall.com/lists/oss-security/2020/02/05/1
• PATCHhttps://github.com/systemd/systemd/commit/ea0d0ede03c6f18dbc5036c5e9cccf97e415ccc2
• PATCHhttps://github.com/systemd/systemd/commit/1068447e6954dc6ce52f099ed174c442cb89ed54
• PATCHhttps://github.com/systemd/systemd/commit/637486261528e8aa3da9f26a4487dc254f4b7abb
• PATCHhttps://github.com/systemd/systemd/commit/bc130b6858327b382b07b3985cf48e2aa9016b2d
• MAILING_LISThttps://lists.debian.org/debian-lts-announce/2022/06/msg00025.html