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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.46%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.46% probability · 38th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- systemd project/systemd · redhat/ceph storage · redhat/discovery · redhat/migration toolkit · redhat/openshift container platform · redhat/enterprise linux · debian/debian linux
- Source
- secalert@redhat.com
References
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1712Issue Tracking, Patch, Third Party Advisory
- https://github.com/systemd/systemd/commit/1068447e6954dc6ce52f099ed174c442cb89ed54Patch, Third Party Advisory
- https://github.com/systemd/systemd/commit/637486261528e8aa3da9f26a4487dc254f4b7abbPatch, Third Party Advisory
- https://github.com/systemd/systemd/commit/bc130b6858327b382b07b3985cf48e2aa9016b2dPatch, Third Party Advisory
- https://github.com/systemd/systemd/commit/ea0d0ede03c6f18dbc5036c5e9cccf97e415ccc2Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/06/msg00025.htmlMailing List, Third Party Advisory
- https://www.openwall.com/lists/oss-security/2020/02/05/1Mailing List, Patch, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1712Issue Tracking, Patch, Third Party Advisory
- https://github.com/systemd/systemd/commit/1068447e6954dc6ce52f099ed174c442cb89ed54Patch, Third Party Advisory
- https://github.com/systemd/systemd/commit/637486261528e8aa3da9f26a4487dc254f4b7abbPatch, Third Party Advisory
- https://github.com/systemd/systemd/commit/bc130b6858327b382b07b3985cf48e2aa9016b2dPatch, Third Party Advisory
- https://github.com/systemd/systemd/commit/ea0d0ede03c6f18dbc5036c5e9cccf97e415ccc2Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/06/msg00025.htmlMailing List, Third Party Advisory
- https://www.openwall.com/lists/oss-security/2020/02/05/1Mailing List, Patch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.