Description (CNA)
Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, Ember’s chunk decoder trims the chunk-size token and accepts leading plus or minus signs instead of requiring one or more hexadecimal digits followed by the required CRLF. When an intermediary forwards chunked data without re-encoding and interprets malformed chunk boundaries differently, an unauthenticated attacker can create TE.TE request smuggling that bypasses intermediary controls, poisons caches, or hijacks the request queue. The same response-path leniency can enable response smuggling against an ember-client used as a gateway when the upstream is malicious or compromised. This issue is fixed in versions 0.23.35 and 1.0.0-M47.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| http4s / http4s | affected < 0.23.35; affected >= 1.0.0-M1, < 1.0.0-M47 |
CWE
CWE-444
References
- https://github.com/http4s/http4s/security/advisories/GHSA-jrpm-956j-96jg
- https://github.com/http4s/http4s/commit/d78612a5abd5a2547487598d3342be05573e16f0
- https://github.com/http4s/http4s/releases/tag/v0.23.35
- https://github.com/http4s/http4s/releases/tag/v1.0.0-M47
ADP enrichment
No English description supplied.
No references supplied.