External service lookups for a number of protocols were vulnerable to a time-of-check/time-of-use (TOCTOU) weakness, involving the JDK DNS cache. Attackers that were timing DNS cache expiry correctly were able to inject configuration that would bypass existing network deny-lists. Attackers could exploit this weakness to discover the existence of restricted network infrastructure and service availability. Improvements were made to include deny-lists not only during the check of the provided connection data, but also during use. No publicly available exploits are known.
| Vulnerable Product | Search on Vulmon | Subscribe to Product |
|---|---|---|
open-xchange open-xchange appsuite backend 7.10.6 |
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open-xchange open-xchange appsuite backend 8.10.0 |
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