PT-2018-4723
CVE-2016-10544
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Published
2018-05-31
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Updated
2020-09-01
Description by
CVSS 3.1
5.9
MediumMetricsAV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Name of the Vulnerable Software and Affected Versions
uws versions 0.10.0 through 0.10.8
Description
The issue arises when a WebSocket server instance with permessage-deflate enabled receives a large WebSocket message. If a 256MB WebSocket message is sent, the compression may shrink it to less than 16MB, allowing it to pass the length check. However, upon inflation, the data can exceed V8's maximum string size, causing the Node process to crash. This can result in a denial of service condition.
Recommendations
Update to version 0.10.9 or later.
As a temporary workaround, consider disabling the
permessage-deflate feature to minimize the risk of exploitation. Found an issue in the description? Have something to add? Feel free to write us 👾