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.”
access.redhat.com/errata/RHSA-2020:0497
access.redhat.com/errata/RHSA-2020:0567
access.redhat.com/errata/RHSA-2020:0601
access.redhat.com/errata/RHSA-2020:0605
access.redhat.com/errata/RHSA-2020:0606
access.redhat.com/errata/RHSA-2020:0804
access.redhat.com/errata/RHSA-2020:0805
access.redhat.com/errata/RHSA-2020:0806
access.redhat.com/errata/RHSA-2020:0811
github.com/netty/netty
github.com/netty/netty/compare/netty-4.1.43.Final...netty-4.1.44.Final
github.com/netty/netty/issues/9866
github.com/netty/netty/pull/9871
github.com/netty/netty/pull/9871/files#diff-e26989b9171ef22c27c9f7d80689cfb059d568c9bd10e75970d96c02d0654878
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nvd.nist.gov/vuln/detail/CVE-2019-20444
usn.ubuntu.com/4532-1
www.debian.org/security/2021/dsa-4885