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Critical DLA-2110-1 6 CVEs

netty-3.9 - security update

Published Feb 19, 2020 · Updated Mar 9, 2026

Fixed packages 1

ReleasePackageFixed in
Debian · 8 netty-3.9 3.9.0.Final-1+deb8u1

Vulnerabilities 6

  • Critical 9.1

    HTTP Request Smuggling in Netty

    HttpObjectDecoder.java in Netty before 4.1.44 allows an HTTP header that lacks a colon, which might be interpreted as a separate header with an incorrect syntax, or might be interpreted as an "invalid fold."

  • High 7.5

    HTTP Request Smuggling in Netty

    Netty before 4.1.42.Final mishandles whitespace before the colon in HTTP headers (such as a "Transfer-Encoding : chunked" line), which leads to HTTP request smuggling.

  • High 7.5

    HTTP Request Smuggling in Netty

    Netty 4.1.43.Final allows HTTP Request Smuggling because it mishandles Transfer-Encoding whitespace (such as a [space]Transfer-Encoding:chunked line) and a later Content-Length header. This issue exists because of an incomplete fix for CVE-2019-16869.

  • Medium —

    Netty denial of service vulnerability

    WebSocket08FrameDecoder in Netty 3.6.x before 3.6.9, 3.7.x before 3.7.1, 3.8.x before 3.8.2, 3.9.x before 3.9.1, and 4.0.x before 4.0.19 allows remote attackers to cause a denial of service (memory consumption) via a TextWebSocketFrame followed by a long stre…

  • Medium —

    Denial of service in Netty

    The SslHandler in Netty before 3.9.2 allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via a crafted SSLv2Hello message.

  • Medium —
    CVE-2019-20445 EPSS 14%

    HTTP Request Smuggling in Netty

    HttpObjectDecoder.java in Netty before 4.1.44 allows a Content-Length header to be accompanied by a second Content-Length header, or by a Transfer-Encoding header.