Overview

This report discusses a critical vulnerability, CVE-2022-31812, that affects all versions of SiPass integrated before V2.95.3.18. This vulnerability could potentially allow an unauthenticated remote attacker to cause a denial of service condition, thereby compromising system integrity and potentially leading to data leakage. Given the severity of the potential impact, this vulnerability warrants immediate attention and mitigation.

Vulnerability Summary

CVE ID: CVE-2022-31812
Severity: High (CVSS: 7.5)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Denial of Service, Potential system compromise, or data leakage

Affected Products

Product | Affected Versions

SiPass Integrated | All versions < V2.95.3.18 How the Exploit Works

The vulnerability stems from an out-of-bounds read past the end of an allocated buffer in the server applications of SiPass Integrated. This flaw occurs while checking the integrity of incoming packets. Unauthenticated remote attackers can exploit this vulnerability by sending specially crafted packets to the server, causing an out-of-bounds read. This could lead to a Denial of Service (DoS) or potentially further compromise the system, leading to data leakage.

Conceptual Example Code

Given the nature of the vulnerability, an attacker might exploit it by sending a malformed packet that triggers the out-of-bounds read error. Below is a conceptual example of what this might look like in pseudocode:

# pseudocode representing a potential exploit
def create_malicious_packet():
packet = bytearray()
# Fill the packet with data that will trigger the out-of-bounds read
for i in range(0, BUFFER_SIZE + 1):
packet.append(i)
return packet
def send_packet(target_ip, packet):
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect((target_ip, SIPASS_PORT))
sock.send(packet)
sock.close()
malicious_packet = create_malicious_packet()
send_packet("target.example.com", malicious_packet)

Note: This is a conceptual representation and does not represent a real exploit. It is meant to provide an understanding of how the vulnerability might be exploited.