CVE-2019-9517

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Summary:

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.

Reference Links(if available):

  • https://kb.cert.org/vuls/id/605641/
  • https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.md
  • https://lists.apache.org/thread.html/[email protected]%3Cannounce.httpd.apache.org%3E
  • https://lists.apache.org/thread.html/[email protected]%3Ccvs.httpd.apache.org%3E
  • http://www.openwall.com/lists/oss-security/2019/08/15/7
  • CVSS Score (if available)

    v2: / MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:C

    v3: / HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

    Links to Exploits(if available)