Vulnerability Spotlight: EIP Stack Group OpENer information disclosure vulnerability
Summary: Cisco Talos discovered an out-of-bounds read vulnerability, TALOS-2021-1234 (CVE-2021-21777), in EIP Stack Group OpENer's Ethernet/IP UDP handler that could let an attacker obtain sensitive information or cause a denial of service or distributed denial-of-service attack. Cisco confirmed an update was released fixing the issue, and Talos tested and confirmed OpENer version 2.3 and development commit 8c73bf3 could be exploited, with Snort rule 7056 detecting exploitation attempts.
Why it matters: An out-of-bounds read in an Ethernet/IP stack for I/O adapter devices exposes sensitive information and offers a path to denial of service, and Talos confirmed the listed versions are exploitable, so unpatched OpENer deployments remain exposed until updated.
Read the original at Cisco Talos ↗
- Topics
- Endpoint & Network Security
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