ALAS2-2019-1342

Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service. The attacker requests a large amount of data from a specified resource over multiple streams. They manipulate window size and stream priority to force the server to queue the data in 1-byte chunks. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.(CVE-2019-9511)

Some HTTP/2 implementations are vulnerable to a header leak, potentially leading to a denial of service. The attacker sends a stream of headers with a 0-length header name and 0-length header value, optionally Huffman encoded into 1-byte or greater headers. Some implementations allocate memory for these headers and keep the allocation alive until the session dies. This can consume excess memory.(CVE-2019-9516)

Some HTTP/2 implementations are vulnerable to unconstrained interal data buffering, potentially leading to a denial of service. The attacker opens the HTTP/2 window so the peer can send without constraint; however, they leave the TCP window closed so the peer cannot actually write (many of) the bytes on the wire. The attacker then sends a stream of requests for a large response object. Depending on how the servers queue the responses, this can consume excess memory, CPU, or both.(CVE-2019-9517)

aarch64:
    mod_http2-1.15.3-2.amzn2.aarch64
    mod_http2-debuginfo-1.15.3-2.amzn2.aarch64

i686:
    mod_http2-1.15.3-2.amzn2.i686
    mod_http2-debuginfo-1.15.3-2.amzn2.i686

src:
    mod_http2-1.15.3-2.amzn2.src

x86_64:
    mod_http2-1.15.3-2.amzn2.x86_64
    mod_http2-debuginfo-1.15.3-2.amzn2.x86_64