SB2023071201 - Multiple DoS vulnerabilities in Microsoft IIS HTTP.sys driver

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Input validation error (CVE-ID: CVE-2023-32084)

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

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can send specially crafted input to the web server and perform a denial of service (DoS) attack.

2) Input validation error (CVE-ID: CVE-2023-35298)

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

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can send a specially crafted packet to a targeted server utilizing the Server Name Indication (SNI) over HTTP Protocol Stack (http.sys) to process packets and perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-32084
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-35298