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A specially crafted value of the Sec-Websocket-Protocol header could be used
to significantly slow down a ws server.
for(constlengthof[1000,2000,4000,8000,16000,32000]){constvalue='b'+' '.repeat(length)+'x';conststart=process.hrtime.bigint();value.trim().split(/*,*/);constend=process.hrtime.bigint();console.log('length = %d, time = %f ns',length,end-start);}
The vulnerability was responsibly disclosed along with a fix in private by
Robert McLaughlin from University of California, Santa Barbara.
In vulnerable versions of ws, the issue can be mitigated by reducing the maximum
allowed length of the request headers using the --max-http-header-size=size
and/or the maxHeaderSize options.
7.4.5
Bug fixes
UTF-8 validation is now done even if utf-8-validate is not installed
(23ba6b29).
Fixed an edge case where websocket.close() and websocket.terminate() did
not close the connection (67e25ff5).
7.4.4
Bug fixes
Fixed a bug that could cause the process to crash when using the
permessage-deflate extension (92774377).
7.4.3
Bug fixes
The deflate/inflate stream is now reset instead of reinitialized when context
takeover is disabled (#1840).
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Bumps ws from 7.4.1 to 7.4.6.
Release notes
Sourced from ws's releases.
... (truncated)
Commits
f5297f7[dist] 7.4.600c425e[security] Fix ReDoS vulnerability990306d[lint] Fix prettier error32e3a84[security] Remove reference to Node Security Project8c914d1[minor] Fix nitsfc7e27d[ci] Test on node 16587c201[ci] Do not test on node 15f672710[dist] 7.4.567e25ff[fix] Fix case whereabortHandshake()does not close the connection23ba6b2[fix] Make UTF-8 validation work even if utf-8-validate is not installedDependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting
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