PoC Index

CVE-2023-43622

HIGH 7.5EPSS 70.6%

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.

CVSS v3.1
7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
70.59% chance of exploitation in the next 30 days, 99th percentile
Published
2023-10-23
Updated
2025-02-13

Proof-of-concept exploits (2)

References

Related