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Alma Linux: CVE-2023-43622: Moderate: mod_http2 security update (ALSA-2024-2368)

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Alma Linux: CVE-2023-43622: Moderate: mod_http2 security update (ALSA-2024-2368)

Severity
8
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Published
10/23/2023
Created
05/08/2024
Added
05/08/2024
Modified
01/30/2025

Description

An attacker, opening a HTTP/2 connection with an initial window size of 0, was able to block handling of that connection indefinitely in Apache HTTP Server. This could be used to exhaust worker resources in the server, similar to the well known "slow loris" attack pattern. This has been fixed in version 2.4.58, so that such connection are terminated properly after the configured connection timeout. This issue affects Apache HTTP Server: from 2.4.55 through 2.4.57. Users are recommended to upgrade to version 2.4.58, which fixes the issue.

Solution(s)

  • alma-upgrade-mod_http2

References

  • https://attackerkb.com/topics/cve-2023-43622
  • CVE - 2023-43622
  • https://errata.almalinux.org/9/ALSA-2024-2368.html
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