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Exploited vulnerability · CISA KEV

Is CVE-2019-8720 exploited? Yes: in CISA KEV since 23 May 2022

Gociux · WebKitGTK · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2019-8720, WebKitGTK Memory Corruption Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 23 May 2022. It affects WebKitGTK. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 23 May 2022
ransomwareNot knownno confirmed use
EPSSbelow top 10%lower predicted activity right now (it is still confirmed exploited)
severity8.8CVSS 3.1 · high
US federal due13 Jun 2022BOD 22-01 deadline

What it is

WebKitGTK contains a memory corruption vulnerability which can allow an attacker to perform remote code execution.

VendorWebKitGTK (1 exploited CVE in KEV)
ProductWebKitGTK
VulnerabilityWebKitGTK Memory Corruption Vulnerability
WeaknessCWE-119
Published6 Mar 2023
Added to KEV23 May 2022
Reported by (CNA)redhat

What to do

  1. Check whether you run it. Look for WebKitGTK in your asset inventory, including appliances and cloud images. Stack check lists every exploited WebKitGTK 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 6 Mar 2023.
  4. Get told next time. Email alerts when CISA adds a CVE for WebKitGTK.

References

Questions

Is CVE-2019-8720 being exploited?

Yes. CISA added CVE-2019-8720 to the Known Exploited Vulnerabilities catalog on 23 May 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2019-8720 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-2019-8720?

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

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