In version from 3.0.0 to 3.5.3 of Eclipse Vert.x, the WebSocket HTTP upgrade implementation buffers the full http request before doing the handshake, holding the entire request body in memory. There should be a reasonnable limit (8192 bytes) above which the WebSocket gets an HTTP response with the 413 status code and the connection gets closed.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2018-12541 from the MITRE CVE dictionary dictionary and NIST NVD.
| CVSS3 Base Score | 6.5 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | Low |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity Impact | None |
| Availability Impact | High |
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat OpenShift Application Runtimes 1.0 | RHSA-2018:2946 | 2018-10-18 |
| Platform | Package | State |
|---|---|---|
| Red Hat JBoss Fuse 7 | vertx-core | Under investigation |
| Red Hat JBoss Fuse 6 | vertx-core | Under investigation |
Vulmon