CVE-2020-1712
HIGH severity · CVSS 7.8 · Use-after-free
7.8CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products we track (3)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1712 ↗
Additional information
- NVD record
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1712Patch
- https://github.com/systemd/systemd/commit/1068447e6954dc6ce52f099ed174c442cb89ed54Patch
- https://github.com/systemd/systemd/commit/637486261528e8aa3da9f26a4487dc254f4b7abbPatch
- https://github.com/systemd/systemd/commit/bc130b6858327b382b07b3985cf48e2aa9016b2dPatch
- https://github.com/systemd/systemd/commit/ea0d0ede03c6f18dbc5036c5e9cccf97e415ccc2Patch
- https://www.openwall.com/lists/oss-security/2020/02/05/1Patch
- https://lists.debian.org/debian-lts-announce/2022/06/msg00025.htmlAdvisory