CVE-2020-1712

Advisory lineage Upstream: 0 Downstream: 13
Modified
Published: 31 Mar 2020, 16:44
Last modified:09 Jun 2025, 15:53

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (cve.org)
EPSS Score
0.1% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

31 Mar 2020, 16:44
Published
Vulnerability first disclosed
09 Jun 2025, 15:53
Last Modified
Vulnerability information updated

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 Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • v2.0•MEDIUM•Score: 4.6AV:L/AC:L/Au:N/C:P/I:P/A:P

EPSS Trends

Current EPSS score: 0.10%• Percentile: 28%

Techniques & Countermeasures

  • CWE-416•Use After Free

    The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

  • debian•debian_linux

    9.0

  • redhat•ceph_storage

    4.0

  • redhat•discovery

    na

  • redhat•enterprise_linux

    8.0

  • redhat•migration_toolkit

    1.0

  • redhat•openshift_container_platform

    4.0

  • systemd_project•systemd

    ≤ 244

  • [unknown]•systemd

    < v245-rc1

References (7)