What is CVE-2021-21777?

CVE-2021-21777 is a critical-severity vulnerability in Opener_project Opener, 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.

Out-of-bounds Read in Opener_project Opener

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

EPSS: 0.017 (73.8th percentile) — read the EPSS interpretation.

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.

Affected products

Opener_project Opener — versions 2.3
N/a Eip Stack Group — versions EIP Stack Group OpENer 2.3 ,EIP Stack Group OpENer development commit 8c73bf3

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

talos-cna@cisco.com (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-21777?: CVE-2021-21777 is a critical-severity vulnerability in Opener_project Opener, 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.