Out-of-bounds Read in Opener Project

CVE-2021-21777

An information disclosure vulnerability exists in the Ethernet/IP UDP handler functionality of EIP Stack Group OpENer 2.3 and development commit 8c73bf3. A specially crafted network request can lead to an out-of-bounds read.

Vulnerability class: Buffer Overflow

Published · last modified .

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:H.

EPSS exploit prediction

EPSS: 0.017 (75.8th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 75.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2021-21777: held from 0.017 to 0.017.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000

Affected products

  • Opener Project — versions 2.3
  • Eip Stack Group — versions EIP Stack Group OpENer 2.3 ,EIP Stack Group OpENer development commit 8c73bf3

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2021-21777?
CVE-2021-21777 is a critical-severity vulnerability in Opener Project, classified under Out-of-bounds Read. CVSS score: 10.0/10. Published 2021-06-17.
How severe is CVE-2021-21777?
Critical severity. CVSS v3 base score is 10.0 out of 10.