CVE-2023-43622

high · 7.5

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.

7.5

CVSS

70.6%

EPSS (exploit prob.)

99th

EPSS percentile

2023-10-23

Published

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses

CWE-400

Affected products

Vendor	Product	Affected versions
apache	http_server	>= 2.4.55, < 2.4.58

Check a specific version with /api/v1/cve/match.

References

https://httpd.apache.org/security/vulnerabilities_24.html
https://security.netapp.com/advisory/ntap-20231027-0011/
https://httpd.apache.org/security/vulnerabilities_24.html
https://security.netapp.com/advisory/ntap-20231027-0011/

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2023-43622