VDB
ALPINE-CVE-2023-43622
ALPINE-CVE-2023-43622
PUBLISHED
CVSS 7.5 HIGH
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.
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Alpine:v3.22 | apache2 | 2.4.12-r3, 2.4.12-r4, 2.4.16-r0 |
| Alpine:v3.16 | apache2 | 2.2.22-r0, 2.2.22-r1, 2.4.10-r0 |
| Alpine:v3.15 | apache2 | 2.2.22-r0, 2.2.22-r1, 2.4.10-r0 |
| Alpine:v3.17 | apache2 | 2.4.55-r0, 0, 2.2.16-r0 |
| Alpine:v3.20 | apache2 | 2.4.46-r1, 2.4.46-r0, 2.4.43-r0 |
| Alpine:v3.19 | apache2 | 2.4.17-r5, 2.2.16-r0, 2.2.16-r1 |
| Alpine:v3.23 | apache2 | 2.4.20-r0, 2.4.18-r2, 2.4.18-r1 |
| Alpine:v3.21 | apache2 | 2.4.23-r10, 0, 2.2.16-r0 |
| Alpine:v3.18 | apache2 | 2.4.12-r3, 2.4.12-r4, 2.4.16-r0 |
Exploit Intelligence
- CVE-2023–43622 (github-poc-repo)
- CVE-2023–43622 (github-poc)
- cve_version_check.go (github-poc)
- nuclei_routing.go (github-poc)
Timeline
- Oct 23, 2023 CVE Published
- Dec 3, 2025 CVE Updated
- Apr 30, 2026 Distribution Patch