CVE-2023-40175
Description
Puma is a Ruby/Rack web server built for parallelism. Prior to versions 6.3.1 and 5.6.7, puma exhibited incorrect behavior when parsing chunked transfer encoding bodies and zero-length Content-Length headers in a way that allowed HTTP request smuggling. Severity of this issue is highly dependent on the nature of the web site using puma is. This could be caused by either incorrect parsing of trailing fields in chunked transfer encoding bodies or by parsing of blank/zero-length Content-Length headers. Both issues have been addressed and this vulnerability has been fixed in versions 6.3.1 and 5.6.7. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 5.6.5-3+deb12u1 |
| debian | bullseye | affected | |
| debian | forky | fixed | 5.6.7-1 |
| debian | sid | fixed | 5.6.7-1 |
| debian | trixie | fixed | 5.6.7-1 |
References
- https://github.com/puma/puma/security/advisories/GHSA-68xg-gqqm-vgj8
- https://www.suse.com/security/cve/CVE-2023-40175.html
- https://nvd.nist.gov/vuln/detail/CVE-2023-40175
- https://github.com/puma/puma/commit/690155e7d644b80eeef0a6094f9826ee41f1080a
- https://github.com/puma/puma/commit/7405a219801dcebc0ad6e0aa108d4319ca23f662
- https://github.com/puma/puma/commit/ed0f2f94b56982c687452504b95d5f1fbbe3eed1
- https://github.com/puma/puma
- https://github.com/puma/puma/releases/tag/v5.6.7
- https://github.com/puma/puma/releases/tag/v6.3.1
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/puma/CVE-2023-40175.yml
- https://security-tracker.debian.org/tracker/CVE-2023-40175
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.