AIKIDO-2026-774877
vertx-mysql-client is vulnerable to Denial of Service (DoS)
59
CVE Score
Medium
Denial of Service (DoS)
TL;DR
The MySQL decoder in vertx-mysql-client joins multi-packet payloads in one direct-memory buffer and treats a packet of length 0xFFFFFF as not the end. A server can send a stream of those packets, including before authentication, until the client runs out of memory. The fix caps the reassembled size.
How do I fix this?
Upgrade the io.vertx:vertx-mysql-client library to the patch version.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and the client connects to a MySQL server you do not trust.
Package
Versions
4.0.0 - 4.5.34
Fixed in 4.5.355.0.0 - 5.1.8
Fixed in 5.1.105.2.0 - 5.2.0
Fixed in 5.2.1Background info
vertx-mysql-client is vulnerable to Denial of Service (DoS) in versions 4.0.0 - 4.5.34, 5.0.0 - 5.1.8 and 5.2.0 - 5.2.0.
Links
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