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Exploited vulnerability · CISA KEV

Is CVE-2022-23131 exploited? Yes: in CISA KEV since 22 Feb 2022

Gociux · Zabbix Frontend · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2022-23131, Zabbix Frontend Authentication Bypass Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 22 Feb 2022, 40 days after it was published. It affects Zabbix Frontend. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 22 Feb 2022
ransomwareNot knownno confirmed use
EPSStop 1%among the most likely CVEs to be exploited
severity9.1CVSS 3.1 · critical
US federal due8 Mar 2022BOD 22-01 deadline

What it is

Unsafe client-side session storage leading to authentication bypass/instance takeover via Zabbix Frontend with configured SAML.

VendorZabbix (2 exploited CVEs in KEV)
ProductFrontend
VulnerabilityZabbix Frontend Authentication Bypass Vulnerability
WeaknessCWE-290
Published13 Jan 2022
Added to KEV22 Feb 2022
Reported by (CNA)Zabbix

What to do

  1. Check whether you run it. Look for Frontend in your asset inventory, including appliances and cloud images. Stack check lists every exploited Zabbix 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 13 Jan 2022.
  4. Get told next time. Email alerts when CISA adds a CVE for Zabbix.

Other exploited CVEs in Frontend

References

Questions

Is CVE-2022-23131 being exploited?

Yes. CISA added CVE-2022-23131 to the Known Exploited Vulnerabilities catalog on 22 Feb 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2022-23131 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-2022-23131?

Apply updates per vendor instructions. Check Zabbix's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Frontend 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 February 2022 · Zabbix scorecard · act-now radar.

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