Vulnerability Monitor

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CVE-2023-43622

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.

Published

2023-10-23T07:15:11.243

Last Modified

2025-02-13T17:17:13.110

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

Weaknesses

Type: Primary
CWE-400

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	apache	http_server	< 2.4.58	Yes

References

https://httpd.apache.org/security/vulnerabilities_24.html Vendor Advisory ([email protected])
https://security.netapp.com/advisory/ntap-20231027-0011/ Third Party Advisory ([email protected])
https://httpd.apache.org/security/vulnerabilities_24.html Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.netapp.com/advisory/ntap-20231027-0011/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)