CVE-2023-40175
Published: 18 August 2023
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.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
puma Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of standard support)
|
| focal |
Released
(3.12.4-1ubuntu2+esm1)
Available with Ubuntu Pro |
|
| jammy |
Released
(5.5.2-2ubuntu2+esm1)
Available with Ubuntu Pro |
|
| lunar |
Released
(5.6.5-3ubuntu1.1)
|
|
| mantic |
Released
(5.6.5-4ubuntu2)
|
|
| noble |
Released
(5.6.5-4ubuntu2)
|
|
| trusty |
Ignored
(end of standard support)
|
|
| upstream |
Released
(5.6.7)
|
|
| xenial |
Ignored
(end of standard support)
|
|
|
Patches: upstream: https://github.com/puma/puma/commit/690155e7d644b80eeef0a6094f9826ee41f1080a upstream: https://github.com/puma/puma/commit/ed0f2f94b56982c687452504b95d5f1fbbe3eed1 upstream: https://github.com/puma/puma/commit/7405a219801dcebc0ad6e0aa108d4319ca23f662 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 9.8 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |