Use After Free in Systemd Project
CVE-2020-1712
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.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (39.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 39.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Systemd Project
- [Unknown] Systemd — versions before v245-rc1
- Debian Linux — versions 9.0
- Red Hat Ceph Storage — versions 4.0
- Red Hat Discovery
- Red Hat Enterprise Linux — versions 8.0
- Red Hat Migration Toolkit — versions 1.0
- Red Hat Openshift Container Platform — versions 4.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- www.openwall.com/lists/oss-security/2020/02/05/1 (Patch, Mailing List, Third Party Advisory)
- github.com/systemd/systemd/commit/ea0d0ede03c6f18dbc5036c5e9cccf97e415ccc2 (Patch, Third Party Advisory)
- github.com/systemd/systemd/commit/1068447e6954dc6ce52f099ed174c442cb89ed54 (Patch, Third Party Advisory)
- github.com/systemd/systemd/commit/637486261528e8aa3da9f26a4487dc254f4b7abb (Patch, Third Party Advisory)
- github.com/systemd/systemd/commit/bc130b6858327b382b07b3985cf48e2aa9016b2d (Patch, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2022/06/msg00025.html (mailing-list, Mailing List, Third Party Advisory)
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
Frequently asked questions
- What is CVE-2020-1712?
- CVE-2020-1712 is a high-severity vulnerability in Systemd Project, classified under Use After Free. CVSS score: 7.8/10. Published 2020-03-31.
- How severe is CVE-2020-1712?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2020-1712 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.