What’s Vulnerable › Vulnerabilities

CVE-2020-1712

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-03-31 · updated 2026-10-14
• Weakness: CWE-416

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.

Affected products

• Debian Linux: 9.0
• Red Hat Ceph Storage: 4.0
• RedHat Discovery: all versions
• Red Hat Enterprise Linux: 8.0
• RedHat Migration Toolkit: 1.0
• Red Hat OpenShift Container Platform 4.18: 4.0
• systemd: through 244

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://lists.debian.org/debian-lts-announce/2022/06/msg00025.html
• https://www.openwall.com/lists/oss-security/2020/02/05/1
• 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

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