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.

INFO

Published Date :

Oct. 23, 2023, 7:15 a.m.

Last Modified :

Nov. 1, 2023, 6:11 p.m.

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

3.9
Public PoC/Exploit Available at Github

CVE-2023-43622 has a 2 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2023-43622 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Apache http_server
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2023-43622.

URL Resource
https://httpd.apache.org/security/vulnerabilities_24.html Vendor Advisory
https://security.netapp.com/advisory/ntap-20231027-0011/ Third Party Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

CVE-2023–43622

Python

Updated: 2 weeks, 6 days ago
0 stars 0 fork 0 watcher
Born at : May 29, 2024, 1:04 p.m. This repo has been linked 1 different CVEs too.

None

Dockerfile Makefile Go

Updated: 6 months, 2 weeks ago
1 stars 0 fork 0 watcher
Born at : Jan. 22, 2023, 8:54 p.m. This repo has been linked 3 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following table lists the changes that have been made to the CVE-2023-43622 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Nov. 01, 2023

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type https://httpd.apache.org/security/vulnerabilities_24.html No Types Assigned https://httpd.apache.org/security/vulnerabilities_24.html Vendor Advisory
    Changed Reference Type https://security.netapp.com/advisory/ntap-20231027-0011/ No Types Assigned https://security.netapp.com/advisory/ntap-20231027-0011/ Third Party Advisory
    Added CPE Configuration OR *cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:* versions from (including) 2.4.55 up to (excluding) 2.4.58
  • CVE Modified by [email protected]

    Oct. 27, 2023

    Action Type Old Value New Value
    Added Reference https://security.netapp.com/advisory/ntap-20231027-0011/ [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2023-43622 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2023-43622 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.06 }} 0.02%

score

0.26085

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability