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SUSE: CVE-2016-6581: SUSE Linux Security Advisory

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SUSE: CVE-2016-6581: SUSE Linux Security Advisory

Severity
8
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Published
01/10/2017
Created
02/10/2022
Added
02/04/2022
Modified
02/04/2022

Description

A HTTP/2 implementation built using any version of the Python HPACK library between v1.0.0 and v2.2.0 could be targeted for a denial of service attack, specifically a so-called "HPACK Bomb" attack. This attack occurs when an attacker inserts a header field that is exactly the size of the HPACK dynamic header table into the dynamic header table. The attacker can then send a header block that is simply repeated requests to expand that field in the dynamic table. This can lead to a gigantic compression ratio of 4,096 or better, meaning that 16kB of data can decompress to 64MB of data on the target machine.

Solution(s)

  • suse-upgrade-python3-hpack

References

  • 92315
  • CVE-2016-6581

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