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.

CVSS v3.1

10.0 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:H

CVSS v3.0

8.6 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

CVSS v2.0

9.4 HIGHAV:N/AC:L/Au:N/C:C/I:N/A:C

EPSS

1.67% chance of exploitation in the next 30 days, 75th percentile

Published

2021-06-17

Updated

2024-08-03

Proof-of-concept exploits (1)

• https://talosintelligence.com/vulnerability_reports/TALOS-2021-1234

References

• CVE Record
• NVD entry

Related

• CVE-2021-21776
• CVE-2021-21778
• CVE-2021-21775
• CVE-2021-21779
• CVE-2021-21773
• CVE-2021-21781