CVE-2017-18922
9.8 · CRITICALOverview
CVE-2017-18922 is a critical-severity vulnerability affecting libvncserver_project libvncserver. It was published on June 30, 2020 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
It was discovered that websockets.c in LibVNCServer prior to 0.9.12 did not properly decode certain WebSocket frames. A malicious attacker could exploit this by sending specially crafted WebSocket frames to a server, causing a heap-based buffer overflow.
Remediation
Check the references section for vendor advisories and patches from libvncserver_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 |
|---|---|---|---|
| libvncserver_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-2017-18922?
CVE-2017-18922 is a critical-severity vulnerability affecting libvncserver_project libvncserver. It was published on June 30, 2020 and has a CVSS 3.1 base score of 9.8 (CRITICAL).
How severe is CVE-2017-18922?
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-2017-18922?
Check the references section for vendor advisories and patches from libvncserver_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-2017-18922?
CyberStrike's AI-powered security agents can automatically detect CVE-2017-18922 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
AI agents map your attack surface to find vulnerabilities like this one.
Automated penetration testing that runs continuously, not just quarterly.
AI-driven PR review catches vulnerable dependencies before they ship.
Browser-based exploitation validates findings with real proof-of-concept.
Related CRITICAL CVEs from 2017
View all →Vulnerability in the Primavera P6 Enterprise Project Portfolio Management component of Oracle Primav
An issue was discovered in Radisys MRF Web Panel (SWMS) 9.0.1. The MSM_MACRO_NAME POST parameter in
SQL injection vulnerability in the Group Promotions module in the admin control panel in MyBB (aka M
A vulnerability in the web-based GUI of Cisco Prime Home could allow an unauthenticated, remote atta
IBM BigFix Platform could allow a remote attacker to execute arbitrary code on the system, caused by
IBM UrbanCode Deploy could allow a user to execute code using a specially crafted file upload that w
An issue was discovered in Schneider Electric ConneXium firewalls TCSEFEC23F3F20 all versions, TCSEF
An issue was discovered in Moxa OnCell OnCellG3470A-LTE, AWK-1131A/3131A/4131A Series, AWK-3191 Seri
An issue was discovered in Rockwell Automation Logix5000 Programmable Automation Controller FRN 16.0
An issue was discovered in Carlo Gavazzi VMU-C EM prior to firmware Version A11_U05, and VMU-C PV pr
An exploitable buffer overflow exists in the psnotifyd application of the Pharos PopUp printer clien
A buffer overflows exists in the psnotifyd application of the Pharos PopUp printer client version 9.