CVE-2021-43848 Unititialized memory access in h2o

h2o is an open source http server. In code prior to the 8c0eca3 commit h2o may attempt to access uninitialized memory. When receiving QUIC frames in certain order, HTTP/3 server-side implementation of h2o can be misguided to treat uninitialized memory as HTTP/3 frames that have been received. Whe...

CVE-2021-43848

CVE-2021-43848 concerns h2o, an open source HTTP server. Affects HTTP/3 support where, from commits 93af138 to d1f0f65, h2o may access uninitialized memory when processing QUIC frames, potentially treating such memory as HTTP/3 frames. In reverse proxy scenarios, an attacker could cause h2o to le...