CVE-2019-8259 : Exploit Details and Defense Strategies

UltraVNC revision 1198 contains multiple memory leaks in the VNC client code, potentially allowing attackers to access stack memory for information disclosure. This vulnerability, when combined with another flaw, could lead to the leakage of stack memory and bypass ASLR security measures. The issue has been resolved in revision 1199.

Understanding CVE-2019-8259

This CVE involves memory leaks in UltraVNC revision 1198 that could be exploited for information disclosure.

What is CVE-2019-8259?

The vulnerability in UltraVNC revision 1198 allows attackers to access stack memory, potentially leading to information disclosure. When exploited with another vulnerability, it can bypass ASLR security measures.

The Impact of CVE-2019-8259

Attackers could exploit memory leaks to access stack memory and disclose sensitive information.
The vulnerability could be used to bypass ASLR security measures.

Technical Details of CVE-2019-8259

UltraVNC revision 1198 is affected by memory leaks that could be exploited by attackers.

Vulnerability Description

The VNC client code in UltraVNC revision 1198 has multiple memory leaks (CWE-655).
Attackers could access stack memory and exploit it for information disclosure.
When combined with another flaw, it can enable the leakage of stack memory and bypass ASLR.

Affected Systems and Versions

Product: UltraVNC
Vendor: UltraVNC
Affected Version: 1.2.2.3

Exploitation Mechanism

The vulnerability can be exploited through network connectivity.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of CVE-2019-8259.

Immediate Steps to Take

Update UltraVNC to the latest revision, 1199, where the vulnerabilities have been resolved.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update software and apply security patches.
Conduct security assessments and penetration testing to identify vulnerabilities.

Patching and Updates

Ensure that all systems running UltraVNC are updated to revision 1199 to mitigate the risk of exploitation.