CVE-2018-7225 : What You Need to Know
Learn about CVE-2018-7225, a vulnerability in LibVNCServer allowing unauthorized access to sensitive data through crafted VNC packets. Find mitigation steps and patching information here.
A vulnerability was detected in LibVNCServer up to version 0.9.11, allowing unauthorized access to sensitive information through specially crafted VNC packets.
Understanding CVE-2018-7225
What is CVE-2018-7225?
An issue in LibVNCServer up to version 0.9.11 allows unauthorized access to potentially sensitive data due to improper sanitization of a specific variable in VNC packets.
The Impact of CVE-2018-7225
This vulnerability can lead to unauthorized access to uninitialized and sensitive information or other unspecified consequences, such as an integer overflow, when exploited through crafted VNC packets.
Technical Details of CVE-2018-7225
Vulnerability Description
The function rfbProcessClientNormalMessage() in rfbserver.c fails to properly sanitize the variable msg.cct.length, enabling unauthorized access to uninitialized and potentially sensitive information.
Affected Systems and Versions
- Product: LibVNCServer
- Vendor: N/A
- Versions affected: Up to version 0.9.11
Exploitation Mechanism
The vulnerability is triggered by specifically crafted VNC packets that exploit the improper sanitization of the msg.cct.length variable.
Mitigation and Prevention
Immediate Steps to Take
- Apply security patches provided by the vendor promptly.
- Monitor vendor advisories and update systems accordingly.
Long-Term Security Practices
- Regularly update software and libraries to the latest versions.
- Implement network segmentation and access controls to limit exposure.
Patching and Updates
- Refer to vendor advisories for patching instructions and updates.