Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2021-3560

7.8 · HIGHActively Exploited

It was found that polkit could be tricked into bypassing the credential checks for D-Bus requests, elevating the privileges of the requestor to the root user.

Published Feb 16, 2022CWE-863EPSS 23.71%

Overview

CVE-2021-3560 is a high-severity vulnerability. It was published on February 16, 2022 and has a CVSS 3.1 base score of 7.8 (HIGH). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

It was found that polkit could be tricked into bypassing the credential checks for D-Bus requests, elevating the privileges of the requestor to the root user. This flaw could be used by an unprivileged local attacker to, for example, create a new local administrator. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refpacketstormsecurity.com/files/172836/polkit-Authentication-Bypass.htmlRefpacketstormsecurity.com/files/172846/Facebook-Fizz-Denial-Of-Service.htmlRefbugzilla.redhat.com/show_bug.cgi?id=1961710Refgithub.blog/2021-06-10-privilege-escalation-polkit-root-on-linux-with-bug/Refpacketstormsecurity.com/files/172836/polkit-Authentication-Bypass.htmlRefpacketstormsecurity.com/files/172846/Facebook-Fizz-Denial-Of-Service.htmlRefbugzilla.redhat.com/show_bug.cgi?id=1961710Refgithub.blog/2021-06-10-privilege-escalation-polkit-root-on-linux-with-bug/CISAwww.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-3560

How CyberStrike helps

Frequently asked questions

What is CVE-2021-3560?

CVE-2021-3560 is a high-severity vulnerability. It was published on February 16, 2022 and has a CVSS 3.1 base score of 7.8 (HIGH). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

How severe is CVE-2021-3560?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-3560?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-3560?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-3560 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related HIGH CVEs from 2021

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999