Home/CVE/A heap use-after-free vulnerability was found in systemd before version v245-rc1, where asynchronous Polkit queries are
CVE

CVE-2020-1712

A heap use-after-free vulnerability was found in systemd before version v245-rc1, where asynchronous Polkit queries are

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.

HIGH · CVSS 7.8 EPSS 0.00105
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules9 YARA rules0
⬡

Weakness Classification

CWE-416Use After Free
CWE-416Use After Free
▤

Affected Products & Versions

7
systemd project systemd<= 244
redhat ceph storageall versions
redhat discoveryall versions
redhat migration toolkitall versions
redhat openshift container platformall versions
redhat enterprise linuxall versions
debian linuxall versions
◈

Sigma Hunt Rules

9
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSharpHound Recon Account Discovery
producthighDiscovery Using AzureHound
producthighPotential GobRAT File Discovery Via Grep
producthighSysmon Discovery Via Default Driver Altitude Using Findstr.EXE
productmediumSystem Information Discovery Using sw_vers
productmediumSystem Information Discovery Via Sysctl - MacOS
▣

Scoring & Timeline

7.8
HIGH · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD31 Mar 2020 · 05:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

13
suse-csafopenSUSE-SU-2024:11420-1
siemens-csafSSA-398330
msrcCVE-2020-1712
suse-csafsuse-ru-2020_0793-1
rhsaRHSA-2020:1475Moderate
🔗

References & Sources

7
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1712Issue TrackingPatchThird Party Advisory
https://github.com/systemd/systemd/commit/1068447e6954dc6ce52f099ed174c442cb89ed54PatchThird Party Advisory
https://github.com/systemd/systemd/commit/637486261528e8aa3da9f26a4487dc254f4b7abbPatchThird Party Advisory
https://github.com/systemd/systemd/commit/bc130b6858327b382b07b3985cf48e2aa9016b2dPatchThird Party Advisory
https://github.com/systemd/systemd/commit/ea0d0ede03c6f18dbc5036c5e9cccf97e415ccc2PatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2022/06/msg00025.htmlMailing ListThird Party Advisory
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