Ubuntu Security Notice 3783-1 - Robert Swiecki discovered that the Apache HTTP Server HTTP/2 module incorrectly destroyed certain streams. A remote attacker could possibly use this issue to cause the server to crash, leading to a denial of service. Craig Young discovered that the Apache HTTP Server HTTP/2 module incorrectly handled certain requests. A remote attacker could possibly use this issue to cause the server to consume resources, leading to a denial of service. Various other issues were also addressed.
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