Http4s Ember HTTP/2: unbounded outbound frame queue
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-8f3q-3jmv-7prw | Http4s Ember HTTP/2 has an unbounded outbound frame queue |
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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ssvc
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| First Time appeared |
Http4s
Http4s http4s |
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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 HTTP/2 serializes outbound frames through one unbounded queue consumed by writeLoop. When the peer stops reading, an unauthenticated HTTP/2 client can continue sending PING, SETTINGS, or DATA frames that cause Ember to enqueue acknowledgments or WINDOW_UPDATE frames faster than the writer drains them, exhausting heap memory on a server built with withHttp2. The shared behavior also affects an ember-client connected to a hostile HTTP/2 server, and the patch replaces the unbounded path with bounded, backpressured outbound queues. This issue is fixed in versions 0.23.35 and 1.0.0-M47. | |
| Title | Http4s Ember HTTP/2: unbounded outbound frame queue | |
| Weaknesses | CWE-400 CWE-770 |
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| Metrics |
cvssV3_1
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