Bug#1113995: netty: CVE-2025-58056

[Salvatore Bonaccorso]

Source: netty
Version: 1:4.1.48-10
Severity: important
Tags: security upstream
Forwarded: https://github.com/netty/netty/issues/15522
X-Debbugs-Cc: carnil at debian.org, Debian Security Team <team at security.debian.org>

Hi,

The following vulnerability was published for netty.

CVE-2025-58056[0]:
| 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.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2025-58056
    https://www.cve.org/CVERecord?id=CVE-2025-58056
[1] https://github.com/netty/netty/security/advisories/GHSA-fghv-69vj-qj49
[2] https://github.com/netty/netty/issues/15522
[3] https://github.com/netty/netty/pull/15611
[4] https://github.com/netty/netty/commit/edb55fd8e0a3bcbd85881e423464f585183d1284

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore