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Exploited vulnerability · CISA KEV

Is CVE-2020-7961 exploited? Yes: in CISA KEV since 3 Nov 2021

Gociux · Liferay Portal · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2020-7961, Liferay Portal Deserialization of Untrusted Data Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 3 Nov 2021, 593 days after it was published. It affects Liferay Portal. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 3 Nov 2021
ransomwareNot knownno confirmed use
EPSStop 1%among the most likely CVEs to be exploited
severity9.8CVSS 3.1 · critical
US federal due3 May 2022BOD 22-01 deadline

What it is

Liferay Portal contains a deserialization of untrusted data vulnerability that allows remote attackers to execute code via JSON web services.

VendorLiferay (1 exploited CVE in KEV)
ProductLiferay Portal
VulnerabilityLiferay Portal Deserialization of Untrusted Data Vulnerability
WeaknessCWE-502
Published20 Mar 2020
Added to KEV3 Nov 2021
Reported by (CNA)mitre

What to do

  1. Check whether you run it. Look for Liferay Portal in your asset inventory, including appliances and cloud images. Stack check lists every exploited Liferay 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 20 Mar 2020.
  4. Get told next time. Email alerts when CISA adds a CVE for Liferay.

References

Questions

Is CVE-2020-7961 being exploited?

Yes. CISA added CVE-2020-7961 to the Known Exploited Vulnerabilities catalog on 3 Nov 2021, which means there is reliable evidence of exploitation in the wild.

Is CVE-2020-7961 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-2020-7961?

Apply updates per vendor instructions. Check Liferay's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Liferay Portal 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 November 2021 · act-now radar.

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