<!--This ticket is confidential.--> <!--############################# Do not remove the lines above #############################--> # CVE Reservation Request <!--There's help in the Eclipse Foundation Project Handbook https://www.eclipse.org/projects/handbook/#vulnerability-cve Note that this issue is configured (see the quick actions at the bottom) to be created as confidential. Note that a vulnerability does not need to actually be resolved before it is reported and that these reports can be revised as needed (reopen the issue to request changes). If you do not know how to fill certain fields, mark that in the comment and we will help you. You can delete the comments (or not).--> The Eclipse Foundation is a [Common Vulnerabilities and Exposures](https://cve.mitre.org/) (CVE) Numbering Authority. Creating this ticket initiates **reservation** of a CVE ID for the documented vulnerability. The reserved CVE ID will be posted in a comment below, and kept **confidential** until explicit publication request. > [!note] > > To request CVE _publication_, please open a [CVE publication](https://gitlab.eclipse.org/security/cve-assignment/-/issues/new?issuable_template=CVE%20Publication%20Request&issue%5Bconfidential%5D=true) ticket. Please fill in the fields below to draft the CVE record. --- <!--Required. Specify the project's name (e.g., "Eclipse Dash") and Eclipse Foundation ID, e.g., "technology.dash".--> ## CVE record information **Project name:** Eclipse Vert.x **Project id:** rt.vertx **Versions affected:** \[4.0.0, 4.5.34\] or \[5.0.0,5.0.12\] or \[5.1.0,5.1.9\] or \[5.2.0, 5.2.0\] **Common Vulnerability Scoring System:** CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H **Summary:** In Eclipse Vert.x versions \[4.0.0, 4.5.34\] or \[5.0.0,5.0.12\] or \[5.1.0,5.1.9\] or \[5.2.0, 5.2.0\], the Vert.x MySQL client (vertx-mysql-client) pre-allocates an array for column definitions based on a server-declared column count with no upper-bound validation. A malicious or compromised MySQL server, or an attacker with man-in-the-middle positioning, can send a crafted result set packet with an extremely large column count, causing the client to attempt a massive heap allocation. The resulting OutOfMemoryError crashes the Netty event loop thread, causing a complete denial of service for all connections and verticles in the Vert.x application. The impacted component is io.vertx:vertx-mysql-client. **Links:** https://github.com/eclipse-vertx/vertx-sql-client/security/advisories/GHSA-9jxp-x3fr-ffqh **Credits:** Mike Read.