CVE-2020-1712 Use after free in systemd
A local unprivileged attacker can exploit a heap use-after-free in systemd to crash services or execute code and elevate privileges via crafted dbus messages.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-1712?
CVE-2020-1712 is a high-severity use after free vulnerability in Debian Debian Linux, published on 31 Mar 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-416
Which versions are affected by CVE-2020-1712?
It affects 7 products.
Linux distribution packages (40)
systemd Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8_1.4 |
systemd-container Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8_1.4 |
systemd-container-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8_1.4 |
systemd-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8_1.4 |
systemd-debugsource Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8_1.4 |
systemd-devel Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8_1.4 |
systemd-journal-remote Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8_1.4 |
systemd-journal-remote-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8_1.4 |
systemd-libs Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8_1.4 |
systemd-libs-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8_1.4 |
systemd-pam Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8_1.4 |
systemd-pam-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8_1.4 |
systemd-tests Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8_1.4 |
systemd-tests-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8_1.4 |
systemd-udev Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8_1.4 |
systemd-udev-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:239-18.el8_1.4 |
systemd Red Hat:rhel_e4s:8.0::baseos | All versions | 0:239-13.el8_0.7 |
systemd-container Red Hat:rhel_e4s:8.0::baseos | All versions | 0:239-13.el8_0.7 |
systemd-container-debuginfo Red Hat:rhel_e4s:8.0::baseos | All versions | 0:239-13.el8_0.7 |
systemd-debuginfo Red Hat:rhel_e4s:8.0::baseos | All versions | 0:239-13.el8_0.7 |
systemd-debugsource Red Hat:rhel_e4s:8.0::baseos | All versions | 0:239-13.el8_0.7 |
systemd-devel Red Hat:rhel_e4s:8.0::baseos | All versions | 0:239-13.el8_0.7 |
systemd-journal-remote Red Hat:rhel_e4s:8.0::baseos | All versions | 0:239-13.el8_0.7 |
systemd-journal-remote-debuginfo Red Hat:rhel_e4s:8.0::baseos | All versions | 0:239-13.el8_0.7 |
systemd-libs Red Hat:rhel_e4s:8.0::baseos | All versions | 0:239-13.el8_0.7 |
systemd-libs-debuginfo Red Hat:rhel_e4s:8.0::baseos | All versions | 0:239-13.el8_0.7 |
systemd-pam Red Hat:rhel_e4s:8.0::baseos | All versions | 0:239-13.el8_0.7 |
systemd-pam-debuginfo Red Hat:rhel_e4s:8.0::baseos | All versions | 0:239-13.el8_0.7 |
systemd-tests Red Hat:rhel_e4s:8.0::baseos | All versions | 0:239-13.el8_0.7 |
systemd-tests-debuginfo Red Hat:rhel_e4s:8.0::baseos | All versions | 0:239-13.el8_0.7 |
systemd-udev Red Hat:rhel_e4s:8.0::baseos | All versions | 0:239-13.el8_0.7 |
systemd-udev-debuginfo Red Hat:rhel_e4s:8.0::baseos | All versions | 0:239-13.el8_0.7 |
systemd SUSE:Enterprise Storage 5 | All versions | 228-150.82.1 |
systemd SUSE:HPE Helion OpenStack 8 | All versions | 228-150.82.1 |
systemd SUSE:Linux Enterprise Desktop 12 SP4 | All versions | 228-150.82.1 |
systemd SUSE:Linux Enterprise Module for Basesystem 15 SP1 | All versions | 234-24.46.1 |
systemd SUSE:Linux Enterprise Server 12 SP2-BCL | All versions | 228-150.82.1 |
systemd SUSE:Linux Enterprise Server 12 SP2-LTSS | All versions | 228-150.82.1 |
systemd SUSE:Linux Enterprise Server 12 SP3-BCL | All versions | 228-150.82.1 |
systemd SUSE:Linux Enterprise Server 12 SP3-LTSS | All versions | 228-150.82.1 |
Products include Debian Debian Linux, Redhat Ceph Storage, Redhat Discovery, Redhat Enterprise Linux, Redhat Migration Toolkit, Redhat Openshift Container Platform and 1 more.
How do I fix CVE-2020-1712?
Upgrade to a fixed version.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2020-1712 being exploited?
There is no known exploitation of CVE-2020-1712 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2020-1712, DLA-3063-1, GHSA-wggx-8wf7-vg3g, RHSA-2020:0564, RHSA-2020:0575, SUSE-RU-2020:0793-1 and 3 more.