| Package | Affected versions | Patched versions |
|---|---|---|
| uws | ≥ 0.10.0, ≤ 0.10.8 | |
| uws | ≥ 0.10.0, < 0.10.9 | 0.10.9 |
Affected versions of uws do not properly handle large websocket messages when permessage-deflate is enabled, which may result in a denial of service condition.
If uws recieves a 256Mb websocket message when permessage-deflate is enabled, the server will compress the message prior to executing the length check, and subsequently extract the message prior to processing. This can result in a situation where an excessively large websocket message passes the length checks, yet still gets cast from a Buffer to a string, which will exceed v8's maximum string size and crash the process.
Update to version 0.10.9 or later.
Alternatively, disable permessage-deflate.
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