Description
Undici has Unhandled Exception in WebSocket Client Due to Invalid server_max_window_bits Validation
Impact
The undici WebSocket client is vulnerable to a denial-of-service attack due to improper validation of the server_max_window_bits parameter in the permessage-deflate extension. When a WebSocket client connects to a server, it automatically advertises support for permessage-deflate compression. A malicious server can respond with an out-of-range server_max_window_bits value (outside zlib's valid range of 8-15). When the server subsequently sends a compressed frame, the client attempts to create a zlib InflateRaw instance with the invalid windowBits value, causing a synchronous RangeError exception that is not caught, resulting in immediate process termination.
The vulnerability exists because:
The isValidClientWindowBits() function only validates that the value contains ASCII digits, not that it falls within the valid range 8-15
The createInflateRaw() call is not wrapped in a try-catch block
The resulting exception propagates up through the call stack and crashes the Node.js process
Patches
Has the problem been patched? What versions should users upgrade to?
Workarounds
Is there a way for users to fix or remediate the vulnerability without upgrading?
Mitigation
Minimal update. May introduce new vulnerabilities or breaking changes.
|
 debian 14 | | =7.15.0+dfsg+~cs3.2.0-1 || =7.15.0+dfsg+~cs3.2.0-3 || =7.16.0+dfsg+~cs3.2.0-1 || =7.16.0+dfsg+~cs3.2.0-2 || =7.18.2+dfsg+~cs3.2.0-1 || =7.3.0+dfsg1+~cs24.12.11-1 || =7.3.0+dfsg1+~cs24.12.11-2 || >=0 <7.24.5+dfsg+~cs3.2.0-1 | 7.24.5+dfsg+~cs3.2.0-1 |
debian 13 | | =7.15.0+dfsg+~cs3.2.0-1 || =7.15.0+dfsg+~cs3.2.0-3 || =7.16.0+dfsg+~cs3.2.0-1 || =7.16.0+dfsg+~cs3.2.0-2 || =7.18.2+dfsg+~cs3.2.0-1 || =7.24.5+dfsg+~cs3.2.0-1 || =7.24.6+dfsg+~cs3.2.0-1 || =7.24.6+dfsg+~cs3.2.0-2 || =7.24.6+dfsg+~cs3.2.0-3 || =7.3.0+dfsg1+~cs24.12.11-1 || =7.3.0+dfsg1+~cs24.12.11-2 || =8.10.2+dfsg+~cs3.2.2-1 || =8.5.0+dfsg+~cs3.2.0-1 || =8.5.0+dfsg+~cs3.2.0-2 || =8.5.0+dfsg+~cs3.2.0-3 || =8.9.0+dfsg+~cs3.2.0-1 | - |
 rpm rhel9 | | <1:22.22.2-1.module+el9.7.0+24157+8ddb2461 | 1:22.22.2-1.module+el9.7.0+24157+8ddb2461 |
rpm rhel10 | | | 1:24.14.1-2.el10_1 |
rpm rhel8 | | <1:22.22.2-1.module+el8.10.0+24148+847b6786 | 1:22.22.2-1.module+el8.10.0+24148+847b6786 |
rpm rhel10 | | | 1:22.22.2-1.el10_1 |
 npm | | >=0 <6.24.0 || >=7.0.0 <7.24.0 | 6.24.0, 7.24.0 |
debian 12 | | =5.15.0+dfsg1+~cs20.10.9.3-1 || =5.15.0+dfsg1+~cs20.10.9.3-1+deb12u1 || =5.15.0+dfsg1+~cs20.10.9.3-1+deb12u2 || =5.15.0+dfsg1+~cs20.10.9.3-1+deb12u3 || =5.15.0+dfsg1+~cs20.10.9.3-1+deb12u4 || =5.19.1+dfsg1+~cs20.10.9.5-1 || =5.19.1+dfsg1+~cs20.10.9.5-2 || =5.22.1+dfsg1+~cs20.10.10.2-1 || =5.26.3+dfsg1+~cs23.10.12-1 || =5.26.3+dfsg1+~cs23.10.12-2 || =5.26.3+dfsg1+~cs23.10.12-3 || =5.28.0+dfsg1+~cs23.11.12.3-1 || =5.28.0+dfsg1+~cs23.11.12.3-2 || =5.28.2+dfsg1+~cs23.11.12.3-1 || =5.28.2+dfsg1+~cs23.11.12.3-2 || =5.28.2+dfsg1+~cs23.11.12.3-3 || =5.28.2+dfsg1+~cs23.11.12.3-4 || =5.28.2+dfsg1+~cs23.11.12.3-5 || =5.28.2+dfsg1+~cs23.11.12.3-6 || =5.28.4+dfsg1+~cs23.12.11-1 || =5.28.4+dfsg1+~cs23.12.11-2 || =7.1.0+dfsg1+~cs24.12.10-1 || =7.15.0+dfsg+~cs3.2.0-1 || =7.15.0+dfsg+~cs3.2.0-3 || =7.16.0+dfsg+~cs3.2.0-1 || =7.16.0+dfsg+~cs3.2.0-2 || =7.18.2+dfsg+~cs3.2.0-1 || =7.2.3+dfsg1+~cs24.12.11-1 || =7.2.3+dfsg1+~cs24.12.11-2 || =7.24.5+dfsg+~cs3.2.0-1 || =7.24.6+dfsg+~cs3.2.0-1 || =7.24.6+dfsg+~cs3.2.0-2 || =7.24.6+dfsg+~cs3.2.0-3 || =7.3.0+dfsg1+~cs24.12.11-1 || =7.3.0+dfsg1+~cs24.12.11-2 || =8.10.2+dfsg+~cs3.2.2-1 || =8.5.0+dfsg+~cs3.2.0-1 || =8.5.0+dfsg+~cs3.2.0-2 || =8.5.0+dfsg+~cs3.2.0-3 || =8.9.0+dfsg+~cs3.2.0-1 | - |
rpm rhel10.0 | | | 1:22.22.2-2.el10_0 |
rpm rhel9.6 | | <1:22.22.2-1.module+el9.6.0+24196+39669d4e | 1:22.22.2-1.module+el9.6.0+24196+39669d4e |
