CyberRota Analysis
AI-GeneratedEnvoy's HttpDatagramHandler is vulnerable to a crash due to improper handling of cached pointers when Capsule Protocol is enabled, particularly during stream recreation scenarios like internal redirects. This flaw can lead to process instability, impacting applications relying on HTTP/3 datagrams. Organizations using affected versions of Envoy should prioritize upgrading to versions 1.36.10, 1.37.6, 1.38.4, or 1.39.1 to mitigate this high-severity risk.
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A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy's HttpDatagramHandler caches the current RequestDecoder when Capsule Protocol is enabled. Stream recreation, including an internal redirect, replaces the ActiveStream and updates EnvoyQuicServerStream but does not update the handler's cached pointer. A subsequent HTTP/3 datagram can call decodeData through the freed decoder, causing invalid virtual dispatch and a process crash. The relevant scope boundary is that hTTP/3 datagrams and Capsule Protocol must be enabled, and the request must enter a stream-recreation path such as an internal redirect. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.
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