CVE-2023-43622

Name
CVE-2023-43622
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.
NVD Severity
medium
Other trackers
Mailing lists
Exploits
Forges
GitHub (code, issues), Aports (code, issues)

References

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

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:* http_server >= 2.4.55 < 2.4.58

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
apache2 3.15-main 2.4.58-r0 Kaarle Ritvanen <kaarle.ritvanen@datakunkku.fi> fixed