CyberRota Analysis
AI-GeneratedA vulnerability exists in BIND 9 DNSSEC validating resolvers that allows an attacker to exploit a random subdomain attack, leading to excessive memory consumption that can exceed the configured `max-cache-size` limit. This can result in degraded performance or service outages for affected systems. Organizations using the specified versions of BIND 9 should prioritize patching to mitigate this high-severity risk.
Original NVD Description
A DNSSEC validating resolver that is under a random subdomain attack against a DNSSEC-signed zone can suffer from runaway memory usage. The attacker needs to be able to send queries faster than the resolver can perform validation. The increased memory usage can be orders of magnitude beyond the limit configured in the `max-cache-size` parameter. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.24, 9.21.0 through 9.21.23, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.24-S1.