UBUNTU-CVE-2025-58056

Advisory lineage Upstream: 1 Downstream: 1
Upstream
CVE-2025-58056
Downstream
USN-7918-1
Published: 03 Sept 2025, 21:15
Last modified:04 Feb 2026, 03:25

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
7.5 HIGH
3.1 (osv_ubuntu)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

03 Sept 2025, 21:15
Published
Vulnerability first disclosed
04 Feb 2026, 03:25
Last Modified
Vulnerability information updated

Description

Netty is an asynchronous event-driven network application framework for development of maintainable high performance protocol servers and clients. In versions 4.1.124.Final, and 4.2.0.Alpha3 through 4.2.4.Final, Netty incorrectly accepts standalone newline characters (LF) as a chunk-size line terminator, regardless of a preceding carriage return (CR), instead of requiring CRLF per HTTP/1.1 standards. When combined with reverse proxies that parse LF differently (treating it as part of the chunk extension), attackers can craft requests that the proxy sees as one request but Netty processes as two, enabling request smuggling attacks. This is fixed in versions 4.1.125.Final and 4.2.5.Final.

CVSS Metrics

  • v4.0•MEDIUM•Score: 6.3CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected Systems

  • ubuntu•netty

    all | < 1:4.0.34-1ubuntu0.1~esm3 | < 1:4.1.7-4ubuntu0.1+esm5 | < 1:4.1.45-1ubuntu0.1~esm4 | < 1:4.1.48-4+deb11u2ubuntu0.1 | < 1:4.1.48-9ubuntu0.1 | < 1:4.1.48-10ubuntu0.25.10.2

  • ubuntu•netty-3.9

    all | all

References (10)