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Exploited vulnerability · CISA KEV

Is CVE-2021-3560 exploited? Yes: in CISA KEV since 12 May 2023

Gociux · Red Hat Polkit · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2021-3560, Red Hat Polkit Incorrect Authorization Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 12 May 2023, 450 days after it was published. It affects Red Hat Polkit. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 12 May 2023
ransomwareNot knownno confirmed use
EPSStop 5%very likely to be exploited
severity7.8CVSS 3.1 · high
US federal due2 Jun 2023BOD 22-01 deadline

What it is

Red Hat Polkit contains an incorrect authorization vulnerability through the bypassing of credential checks for D-Bus requests, allowing for privilege escalation.

VendorRed Hat (9 exploited CVEs in KEV)
ProductPolkit
VulnerabilityRed Hat Polkit Incorrect Authorization Vulnerability
WeaknessCWE-863
Published16 Feb 2022
Added to KEV12 May 2023
Reported by (CNA)redhat

What to do

  1. Check whether you run it. Look for Polkit in your asset inventory, including appliances and cloud images. Stack check lists every exploited Red Hat CVE at once.
  2. Apply the fix. Apply updates per vendor instructions.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 16 Feb 2022.
  4. Get told next time. Email alerts when CISA adds a CVE for Red Hat.

Other exploited CVEs in Polkit

References

Questions

Is CVE-2021-3560 being exploited?

Yes. CISA added CVE-2021-3560 to the Known Exploited Vulnerabilities catalog on 12 May 2023, which means there is reliable evidence of exploitation in the wild.

Is CVE-2021-3560 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2021-3560?

Apply updates per vendor instructions. Check Red Hat's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Polkit and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in May 2023 · Red Hat scorecard · act-now radar.

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