Http4s Ember HTTP/2: unbounded continuation frame accumulation
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| Source | ID | Title |
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Github GHSA |
GHSA-cp4q-fqw9-4hf6 | Http4s Ember HTTP/2: unbounded continuation frame accumulation |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.630% probability within 30 days)
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| Metrics |
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, When Ember receives an HTTP/2 HEADERS or PUSH_PROMISE frame without END_HEADERS, H2Connection buffers the header block and subsequent CONTINUATION fragments without a size bound. A remote peer can keep an incomplete block open and exhaust heap memory before request decoding, affecting an ember-server or ember-client configured with withHttp2. The remediation tracks accumulated size against SETTINGS_MAX_HEADER_LIST_SIZE derived from EmberServerBuilder.maxHeaderSize or EmberClientBuilder.maxResponseHeaderSize, sends GOAWAY when the limit is exceeded, and applies receiveHeadersTimeout to incomplete blocks. This issue is fixed in versions 0.23.35 and 1.0.0-M47. | |
| Title | Http4s Ember HTTP/2: unbounded continuation frame accumulation | |
| Weaknesses | CWE-770 | |
| References |
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| Metrics |
cvssV3_1
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