[DRE-maint] Bug#1060345: puma: CVE-2024-21647: Invalid parsing of chunked encoding in HTTP/1.1 allows DoS attacks

[Salvatore Bonaccorso]

Source: puma
Version: 5.6.7-1
Severity: important
Tags: security upstream
X-Debbugs-Cc: carnil at debian.org, Debian Security Team <team at security.debian.org>

Hi,

The following vulnerability was published for puma.

CVE-2024-21647[0]:
| Puma is a web server for Ruby/Rack applications built for
| parallelism. Prior to version 6.4.2, puma exhibited incorrect
| behavior when parsing chunked transfer encoding bodies in a way that
| allowed HTTP request smuggling. Fixed versions limits the size of
| chunk extensions. Without this limit, an attacker could cause
| unbounded resource (CPU, network bandwidth) consumption. This
| vulnerability has been fixed in versions 6.4.2 and 5.6.8.


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-2024-21647
    https://www.cve.org/CVERecord?id=CVE-2024-21647
[1] https://github.com/puma/puma/security/advisories/GHSA-c2f4-cvqm-65w2
[2] https://github.com/puma/puma/commit/bbb880ffb6debbfdea535b4b3eb2204d49ae151d

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore