CVE-2023-6534

Summary

CVE-2023-6534 is a vulnerability affecting specific versions of FreeBSD's pf(4) packet filter. In these releases, including FreeBSD 14.0-RELEASE before 14-RELEASE-p2, FreeBSD 13.2-RELEASE before 13.2-RELEASE-p7, and FreeBSD 12.4-RELEASE before 12.4-RELEASE-p9, an issue exists where TCP sequence numbers are not validated correctly. This flaw could enable a malicious actor to perform denial-of-service attacks against hosts protected by the firewall. By exploiting this issue, attackers could potentially flood the targeted systems with malicious packets, leading to network congestion and service disruption. It is recommended that users upgrade their affected FreeBSD systems to the respective patched releases to mitigate this vulnerability.

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