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Exploited vulnerability · CISA KEV

Is CVE-2021-38406 exploited? Yes: in CISA KEV since 25 Aug 2022

Gociux · Delta Electronics DOPSoft 2 · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2021-38406, Delta Electronics DOPSoft 2 Improper Input Validation Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 25 Aug 2022, 342 days after it was published. It affects Delta Electronics DOPSoft 2. If you run it, CISA's required action is: The impacted product is end-of-life and should be disconnected if still in use.

exploitedYesCISA KEV · 25 Aug 2022
ransomwareNot knownno confirmed use
EPSStop 1%among the most likely CVEs to be exploited
severity7.8CVSS 3.1 · high
US federal due15 Sep 2022BOD 22-01 deadline

What it is

Delta Electronics DOPSoft 2 lacks proper validation of user-supplied data when parsing specific project files (improper input validation) resulting in an out-of-bounds write that allows for code execution.

VendorDelta Electronics (1 exploited CVE in KEV)
ProductDOPSoft 2
VulnerabilityDelta Electronics DOPSoft 2 Improper Input Validation Vulnerability
WeaknessCWE-787
Published17 Sep 2021
Added to KEV25 Aug 2022
Reported by (CNA)icscert

What to do

  1. Check whether you run it. Look for DOPSoft 2 in your asset inventory, including appliances and cloud images. Stack check lists every exploited Delta Electronics CVE at once.
  2. Apply the fix. The impacted product is end-of-life and should be disconnected if still in use.
  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 17 Sep 2021.
  4. Get told next time. Email alerts when CISA adds a CVE for Delta Electronics.

References

Questions

Is CVE-2021-38406 being exploited?

Yes. CISA added CVE-2021-38406 to the Known Exploited Vulnerabilities catalog on 25 Aug 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2021-38406 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-2021-38406?

The impacted product is end-of-life and should be disconnected if still in use. Check Delta Electronics's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected DOPSoft 2 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 August 2022 · act-now radar.

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