Descriptionws is an open source WebSocket client and server for Node.js. A request with a number of headers exceeding theserver.maxHeadersCount threshold could be used to crash a ws server. The vulnerability was fixed in ws@8.17.1 (e55e510) and backported to ws@7.5.10 (22c2876), ws@6.2.3 (eeb76d3), and ws@5.2.4 (4abd8f6). In vulnerable versions of ws, the issue can be mitigated in the following ways: 1. Reduce the maximum allowed length of the request headers using the --max-http-header-size=size and/or the maxHeaderSize options so that no more headers than the server.maxHeadersCount limit can be sent. 2. Set server.maxHeadersCount to 0 so that no limit is applied.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs1074236

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
node-ws (PTS)bullseye7.4.2+~cs18.0.8-2vulnerable
sid, trixie8.18.0+~cs13.7.11-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs


[bookworm] - node-ws <no-dsa> (Minor issue)
[bullseye] - node-ws <no-dsa> (Minor issue)
[buster] - node-ws <postponed> (Minor issue, DoS) (8.17.1) (7.5.10) (6.2.3) (5.2.4)

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