Puma HTTP Request/Response Smuggling vulnerability
### Impact Prior to versions 6.4.2 and 5.6.8, puma exhibited dangerous behavior when parsing chunked transfer encoding bodies. Fixed versions limit the size of chunk extensions. Without this limit, an attacker could cause unbounded resource (CPU, network bandwidth) consumption. ### Patches The vulnerability has been fixed in 6.4.2 and 5.6.8. ### Workarounds No known workarounds. ### References * [HTTP Request Smuggling](https://portswigger.net/web-security/request-smuggling) * Open an issue in [Puma](https://github.com/puma/puma) * See our [security policy](https://github.com/puma/puma/security/policy)
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2024-21647US | high7.5 | — | ||
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… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/puma/pumaPACKAGE
- https://github.com/puma/puma/commit/5fc43d73b6ff193325e657a24ed76dec79133e93WEB
- https://github.com/puma/puma/commit/60d5ee3734adc8cee85c3f0561af392448fe19b7WEB
- https://github.com/puma/puma/commit/bbb880ffb6debbfdea535b4b3eb2204d49ae151dWEB
- https://github.com/puma/puma/security/advisories/GHSA-c2f4-cvqm-65w2WEB
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/puma/CVE-2024-21647.ymlWEB
- https://lists.debian.org/debian-lts-announce/2024/11/msg00004.htmlWEB
- https://nvd.nist.gov/vuln/detail/CVE-2024-21647ADVISORY
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