MGASA-2019-0291

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MGASA-2019-0291

Summary: Updated nghttp2 packages fix security vulnerabilities

Details: The updated packages fix security vulnerabilities: 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 resource loops, potentially leading to a denial of service. The attacker creates multiple request streams and continually shuffles the priority of the streams in a way that causes substantial churn to the priority tree. This can consume excess CPU. (CVE-2019-9513)

References: https://advisories.mageia.org/MGASA-2019-0291.html, https://bugs.mageia.org/show_bug.cgi?id=25424, https://access.redhat.com/errata/RHSA-2019:2692