CVE-2019-13556 Explained : Impact and Mitigation
Learn about CVE-2019-13556 affecting WebAccess versions prior to 8.4.1. Understand the risks of stack-based buffer overflow vulnerabilities and how to mitigate them.
WebAccess versions prior to 8.4.1 are vulnerable to multiple stack-based buffer overflow issues due to inadequate validation of user-supplied data lengths, potentially leading to remote code execution.
Understanding CVE-2019-13556
Versions of WebAccess prior to 8.4.1 have inherent vulnerabilities that stem from the absence of adequate validation for user-supplied data lengths. These vulnerabilities, manifested as multiple stack-based buffer overflow vulnerabilities, have the potential to be exploited for the purpose of remote code execution.
What is CVE-2019-13556?
In WebAccess versions 8.4.1 and prior, multiple stack-based buffer overflow vulnerabilities are caused by a lack of proper validation of the length of user-supplied data. Exploitation of these vulnerabilities may allow remote code execution.
The Impact of CVE-2019-13556
- The vulnerabilities in WebAccess versions prior to 8.4.1 can be exploited for remote code execution.
Technical Details of CVE-2019-13556
WebAccess versions prior to 8.4.1 are affected by the following:
Vulnerability Description
- Inadequate validation of user-supplied data lengths leading to stack-based buffer overflow vulnerabilities.
Affected Systems and Versions
- Product: WebAccess
- Vendor: n/a
- Versions affected: 8.4.1 and prior
Exploitation Mechanism
- Attackers can exploit these vulnerabilities to execute remote code on affected systems.
Mitigation and Prevention
It is crucial to take immediate steps to address and prevent the exploitation of CVE-2019-13556:
Immediate Steps to Take
- Update WebAccess to version 8.4.1 or later to mitigate the vulnerabilities.
- Implement network segmentation to limit the impact of potential attacks.
Long-Term Security Practices
- Regularly monitor and update software to patch known vulnerabilities.
- Conduct security assessments and penetration testing to identify and address weaknesses.
Patching and Updates
- Apply security patches and updates provided by the vendor to ensure the system is protected against known vulnerabilities.