CVE-2023-43622
CVSS 3.1 Score 7.5 of 10 (high)
Details
Published Oct 23, 2023
Updated: Nov 1, 2023
CWE ID 400
Summary
CVE-2023-43622 is a vulnerability in Apache HTTP Server versions 2.4.55 through 2.4.57. An attacker can exploit this issue by opening a HTTP/2 connection with an initial window size of 0, which indefinitely blocks handling of that connection. This could result in the exhaustion of worker resources in the server, mimicking the infamous "slow loris" attack pattern. To mitigate this risk, users are advised to upgrade to version 2.4.58, as it terminates such connections properly after the configured timeout.
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Affected Products
- Apache Software Foundation Apache HTTP Server
Affected Vendors
- Apache Software Foundation
Advisories, Assessments, and Mitigations
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