QID 981483

QID 981483: Nodejs (npm) Security Update for websocket-extensions (GHSA-g78m-2chm-r7qv)

Security update has been released for websocket-extensions to fix the vulnerability.

Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

The ReDoS flaw allows an attacker to exhaust the server's capacity to process
incoming requests by sending a WebSocket handshake request containing a header
of the following form:

Sec-WebSocket-Extensions: a; b="\c\c\c\c\c\c\c\c\c\c ...

That is, a header containing an unclosed string parameter value whose content is
a repeating two-byte sequence of a backslash and some other character. The
parser takes exponential time to reject this header as invalid, and this will
block the processing of any other work on the same thread. Thus if you are
running a single-threaded server, such a request can render your service
completely unavailable.

  • CVSS V3 rated as High - 7.5 severity.
  • CVSS V2 rated as Medium - 5 severity.
    • Solution
    Users should upgrade to version 0.1.4.Workaround:
    There are no known work-arounds other than disabling any public-facing
    WebSocket functionality you are operating.
    Vendor References

    CVEs related to QID 981483

    CVE-2020-7662 |
    Software Advisories
    Advisory ID Software Component Link
    GHSA-g78m-2chm-r7qv websocket-extensions URL Logo github.com/advisories/GHSA-g78m-2chm-r7qv
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