SB2024040903 - Multiple vulnerabilities in cPanel EasyApache

Description

This security bulletin contains information about 6 secuirty vulnerabilities.

1) HTTP response splitting (CVE-ID: CVE-2024-24795)

The vulnerability allows a remote attacker to perform HTTP splitting attacks.

The vulnerability exists due to software does not correctly process CRLF character sequences in multiple modules. A remote attacker can inject malicious response headers into backend applications and perform an HTTP desynchronization attack.

Successful exploitation of the vulnerability may allow an attacker perform cache poisoning attack.

2) Resource exhaustion (CVE-ID: CVE-2024-27316)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources when handling HTTP/2 requests. A remote attacker can send specially crafted HTTP/2 requests to the server and perform a denial of service (DoS) attack.

3) HTTP response splitting (CVE-ID: CVE-2023-38709)

The vulnerability allows a remote attacker to perform HTTP splitting attacks.

The vulnerability exists due to software does not correctly process CRLF character sequences. A malicious or exploitable backend/content generators can send specially crafted response containing CRLF sequence and make the application to send a split HTTP response.

Successful exploitation of the vulnerability may allow an attacker perform cache poisoning attack.

4) Reachable Assertion (CVE-ID: CVE-2024-27983)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a reachable assertion when handling HTTP/2 packets. A remote attacker can send a small amount of HTTP/2 frames packets with a few HTTP/2 frames inside and perform a denial of service (DoS) attack.

5) Inconsistent interpretation of HTTP requests (CVE-ID: CVE-2024-27982)

The vulnerability allows a remote attacker to perform HTTP request smuggling attacks.

The vulnerability exists due to improper validation of HTTP requests. A remote attacker can send a specially crafted HTTP request to the server and smuggle arbitrary HTTP headers.

Successful exploitation of vulnerability may allow an attacker to poison HTTP cache and perform phishing attacks.

6) Input validation error (CVE-ID: CVE-2024-28182)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to reading the unbounded number of HTTP/2 CONTINUATION frames. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://news.cpanel.com/easyapache4-2024-04-08-maintenance-and-security-release/