Http4s: Ember chunk parser lenience (TE.TE request smuggling)
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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Github GHSA |
GHSA-jrpm-956j-96jg | Http4s: Ember chunk parser lenience (TE.TE request smuggling) |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.368% probability within 30 days)
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ssvc
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| First Time appeared |
Http4s
Http4s http4s |
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| Vendors & Products |
Http4s
Http4s http4s |
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| Description | 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. | |
| Title | Http4s: Ember chunk parser lenience (TE.TE request smuggling) | |
| Weaknesses | CWE-444 | |
| References |
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| Metrics |
cvssV3_1
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