systemd up to v244 Polkit Query use after free

CVSS Meta Temp Score
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CTI Interest Score
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7.0$0-$5k0.00

Summaryinfo

A vulnerability was found in systemd up to v244. It has been declared as problematic. The affected element is an unknown function of the component Polkit Query Handler. The manipulation results in use after free. This vulnerability is identified as CVE-2020-1712. The attack is only possible with local access. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in systemd up to v244. It has been classified as problematic. Affected is some unknown processing of the component Polkit Query Handler. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on availability. CVE summarizes:

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.

The weakness was released 03/31/2020 as not defined bug report (Bugzilla). The advisory is available at bugzilla.redhat.com. This vulnerability is traded as CVE-2020-1712 since 11/27/2019. Local access is required to approach this attack. Required for exploitation is a authentication. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 236564 (Alibaba Cloud Linux 3 : 0039: systemd (ALINUX3-SA-2022:0039)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 245-rc1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (236564). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 7.0

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CNA Base Score: 7.8
CNA Vector (Red Hat, Inc.): 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 236564
Nessus Name: Alibaba Cloud Linux 3 : 0039: systemd (ALINUX3-SA-2022:0039)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: systemd 245-rc1
Patch: github.com

Timelineinfo

11/27/2019 🔍
03/31/2020 +125 days 🔍
04/01/2020 +1 days 🔍
05/21/2025 +1876 days 🔍

Sourcesinfo

Product: github.com

Advisory: 1068447e6954dc6ce52f099ed174c442cb89ed54
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2020-1712 (🔍)
GCVE (CVE): GCVE-0-2020-1712
GCVE (VulDB): GCVE-100-152466

Entryinfo

Created: 04/01/2020 08:30
Updated: 05/21/2025 21:09
Changes: 04/01/2020 08:30 (39), 04/01/2020 08:35 (11), 10/05/2020 14:22 (1), 05/12/2024 15:01 (18), 05/12/2024 15:05 (20), 05/21/2025 21:09 (5)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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