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Critical DLA-2364-1 4 CVEs

netty - security update

Published Sep 4, 2020 · Updated Mar 9, 2026

Ecosystem: Debian

Fixed packages 1

ReleasePackageFixed in
Debian · 9 netty 1:4.1.7-2+deb9u2

Vulnerabilities 4

  • Critical 9.1
    CVE-2019-20444

    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."

    druid netty netty io.netty:netty-codec-http Debian Ubuntu Wolfi Maven
  • High 7.5
    CVE-2020-11612

    Denial of Service in Netty

    The ZlibDecoders in Netty 4.1.x before 4.1.46 allow for unbounded memory allocation while decoding a ZlibEncoded byte stream. An attacker could send a large ZlibEncoded byte stream to the Netty server, forcing the server to allocate all of its free memory to …

    netty netty io.netty:netty-handler Debian Ubuntu Maven
  • High 7.5
    CVE-2020-7238

    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.

    netty netty io.netty:netty-handler netty-3.9 Debian Ubuntu Maven
  • 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.

    druid netty netty io.netty:netty-handler Debian Ubuntu Wolfi Maven