CVE-2017-6030

Description

A Predictable Value Range from Previous Values issue was discovered in Schneider Electric Modicon PLCs Modicon M221, firmware versions prior to Version 1.5.0.0, Modicon M241, firmware versions prior to Version 4.0.5.11, and Modicon M251, firmware versions prior to Version 4.0.5.11. The affected products generate insufficiently random TCP initial sequence numbers that may allow an attacker to predict the numbers from previous values. This may allow an attacker to spoof or disrupt TCP connections.

Predictions

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No vendor mitigations ingested yet for this CVE. The mitigation-content worker queues fetches as references arrive — check back in a few minutes, or see the references list below.

References

• http://www.securityfocus.com/bid/97254
• https://ics-cert.us-cert.gov/advisories/ICSA-17-089-02
• http://www.securityfocus.com/bid/97254
• https://ics-cert.us-cert.gov/advisories/ICSA-17-089-02

CWEs

CWE-343 CWE-331