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Exploited vulnerability · CISA KEV

Is CVE-2018-8298 exploited? Yes: in CISA KEV since 3 Mar 2022

Gociux · ChakraCore scripting engine · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2018-8298, ChakraCore Scripting Engine Type Confusion Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 3 Mar 2022, 1331 days after it was published. It affects ChakraCore scripting engine. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 3 Mar 2022
ransomwareNot knownno confirmed use
EPSStop 1%among the most likely CVEs to be exploited
severity7.5CVSS 3.1 · high
US federal due17 Mar 2022BOD 22-01 deadline

What it is

The ChakraCore scripting engine contains a type confusion vulnerability which can allow for remote code execution.

VendorChakraCore (1 exploited CVE in KEV)
ProductChakraCore scripting engine
VulnerabilityChakraCore Scripting Engine Type Confusion Vulnerability
WeaknessCWE-843
Published11 Jul 2018
Added to KEV3 Mar 2022
Reported by (CNA)microsoft

What to do

  1. Check whether you run it. Look for ChakraCore scripting engine in your asset inventory, including appliances and cloud images. Stack check lists every exploited ChakraCore 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 11 Jul 2018.
  4. Get told next time. Email alerts when CISA adds a CVE for ChakraCore.

References

Questions

Is CVE-2018-8298 being exploited?

Yes. CISA added CVE-2018-8298 to the Known Exploited Vulnerabilities catalog on 3 Mar 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2018-8298 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-2018-8298?

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

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