Overview
The cybersecurity landscape is constantly under threat from new vulnerabilities. One such critical vulnerability, CVE-2025-1991, affects IBM’s Informix Dynamic Server versions 12.10, 14.10, and 15.0. This vulnerability could potentially allow a remote attacker to cause a denial of service (DoS) in the affected systems, leading to potential system compromise or data leakage.
Vulnerability Summary
CVE ID: CVE-2025-1991
Severity: High – CVSS:7.5
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: The vulnerability could allow an attacker to cause a denial of service, potentially compromising the system or leading to data leakage.
Affected Products
Product | Affected Versions
IBM Informix Dynamic Server | 12.10
IBM Informix Dynamic Server | 14.10
IBM Informix Dynamic Server | 15.0
How the Exploit Works
The vulnerability lies in the processing packets of the IBM Informix Dynamic Server. An integer underflow error when processing packets allows for a remote attacker to send specifically crafted packets to the server, disrupting its normal functioning and causing a denial of service. This could potentially lead to unauthorized access to sensitive information or even system compromise.
Conceptual Example Code
This is a theoretical example of how an attacker might exploit the vulnerability using a crafted packet.
POST /process_packet HTTP/1.1
Host: target.example.com
Content-Type: application/json
{
"packet": {
"size": -1,
"content": "malicious_content"
}
}
In this example, the packet size is set to -1, potentially triggering the integer underflow error in the server’s packet processing function.
Mitigation Guidance
Users are advised to apply the vendor-provided patch to fix this vulnerability as soon as it becomes available. In the meantime, implementing a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation against potential attacks exploiting this vulnerability.
