CVE-2019-20444

Publication date 29 January 2020

Last updated 18 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

9.1 · Critical

Score breakdown

Description

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."

From the Ubuntu Security Team

It was discovered that Netty has HTTP request smuggling vulnerability. A remote attacker could use it to extract sensitive information.

Status

Package Ubuntu Release Status
netty 25.10 questing
Not affected
25.04 plucky
Not affected
24.10 oracular
Not affected
24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar
Not affected
22.10 kinetic
Not affected
22.04 LTS jammy
Not affected
21.10 impish
Not affected
21.04 hirsute
Not affected
20.10 groovy
Not affected
20.04 LTS focal
Not affected
19.10 eoan Ignored end of life
18.04 LTS bionic
Fixed 1:4.1.7-4ubuntu0.1
16.04 LTS xenial
Vulnerable
14.04 LTS trusty
Fixed 1:3.2.6.Final-2+deb8u2build0.14.04.1~esm1
netty-3.9 25.10 questing Not in release
25.04 plucky Not in release
24.10 oracular Not in release
24.04 LTS noble Not in release
23.10 mantic Not in release
23.04 lunar Not in release
22.10 kinetic Not in release
22.04 LTS jammy Not in release
21.10 impish Not in release
21.04 hirsute Not in release
20.10 groovy Not in release
20.04 LTS focal Not in release
18.04 LTS bionic
Fixed 3.9.9.Final-1+deb9u1build0.18.04.1
16.04 LTS xenial
Fixed 3.9.0.Final-1ubuntu0.1
14.04 LTS trusty Not in release

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Severity score breakdown

Parameter Value
Base score 9.1 · Critical
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

References

Related Ubuntu Security Notices (USN)

    • USN-4532-1
    • Netty vulnerabilities
    • 22 September 2020
    • USN-4600-1
    • Netty vulnerabilities
    • 22 October 2020
    • USN-4600-2
    • Netty vulnerabilities
    • 27 October 2020

Other references