CVE-2018-20748
9.8 · CRITICALOverview
CVE-2018-20748 is a critical-severity vulnerability affecting libvnc_project libvncserver. It was published on January 30, 2019 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
LibVNC before 0.9.12 contains multiple heap out-of-bounds write vulnerabilities in libvncclient/rfbproto.c. The fix for CVE-2018-20019 was incomplete.
Remediation
Check the references section for vendor advisories and patches from libvnc_project. Update libvncserver to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| libvnc_project | libvncserver | >= 0, < 0.9.12 | Affected |
| siemens | simatic_itc1500_firmware | >= 3.0.0.0, < 3.2.1.0 | Affected |
| siemens | simatic_itc1500_pro_firmware | >= 3.0.0.0, < 3.2.1.0 | Affected |
| siemens | simatic_itc1900_firmware | >= 3.0.0.0, < 3.2.1.0 | Affected |
| siemens | simatic_itc1900_pro_firmware | >= 3.0.0.0, < 3.2.1.0 | Affected |
| siemens | simatic_itc2200_firmware | >= 3.0.0.0, < 3.2.1.0 | Affected |
| siemens | simatic_itc2200_pro_firmware | >= 3.0.0.0, < 3.2.1.0 | Affected |
References
Frequently Asked Questions
What is CVE-2018-20748?
CVE-2018-20748 is a critical-severity vulnerability affecting libvnc_project libvncserver. It was published on January 30, 2019 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
How severe is CVE-2018-20748?
This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2018-20748?
Check the references section for vendor advisories and patches from libvnc_project. Update libvncserver to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2018-20748?
CyberStrike's AI-powered security agents can automatically detect CVE-2018-20748 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
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