CVE-2023-43622
Public on 2023-10-23
Modified on 2024-02-07
Description
A flaw was found in httpd. This flaw allows an attacker opening an HTTP/2 connection with an initial window size of 0 to block handling of that connection indefinitely in the Apache HTTP Server. This vulnerability can exhaust worker resources in the server, similar to the well-known "slow loris" attack pattern.
Severity
Medium
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 2 - Core | httpd | 2023-10-30 | ALAS2-2023-2322 | Fixed |
| Amazon Linux 2023 | httpd | 2023-11-09 | ALAS2023-2023-433 | Fixed |
| Amazon Linux 1 | httpd24 | 2023-10-30 | ALAS-2023-1877 | Fixed |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| NVD | CVSSv3 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |