SB2024042921 - Multiple vulnerabilities in QNAP Proxy Server

Description

This security bulletin contains information about 4 secuirty vulnerabilities.

1) Improper Handling of Structural Elements (CVE-ID: CVE-2023-5824)

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

The vulnerability exists due to improper handling of structural elements in HTTP response caching. A remote user can cause a denial of service condition on the target system.

2) Improper Certificate Validation (CVE-ID: CVE-2023-46724)

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

The vulnerability exists due to improper input validation when processing a specially crafted SSL Certificate in a server certificate chain. A remote attacker can initiate a TLS Handshake with a specially crafted SSL certificate and perform a denial of service (DoS) attack.

3) Inconsistent interpretation of HTTP requests (CVE-ID: CVE-2023-46846)

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

The vulnerability exists due to improper validation of HTTP requests when parsing HTTP/1.1 and ICAP messages. 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.

4) Buffer overflow (CVE-ID: CVE-2023-46847)

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

The vulnerability exists due to a boundary error in HTTP Digest Authentication. A remote attacker can trigger memory corruption and cause a denial of service condition on the target system.

Remediation

Install update from vendor's website.

References

• https://www.qnap.com/en/security-advisory/qsa-24-18