CVE-2018-20748
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.
Description
Multiple LibVNC vulnerabilities in the affected products listed below could allow remote code execution, information disclosure and Denial-of-Service attacks under certain conditions. Siemens has released updates for the affected products and recommends to update to the latest versions.
No summary for this CVE yet.
CVSS Vector Breakdown
Exploitability
AV:NAttack VectorNetwork
AC:LAttack ComplexityLow
PR:NPrivileges RequiredNone
UI:NUser InteractionNone
Scope
S:UScopeUnchanged
Impact
C:HConfidentialityHigh
I:HIntegrityHigh
A:HAvailabilityHigh
Weaknesses
Affected Products
siemens
commercial·DEaka siemens ag
Canonical Ltd.
commercial·GBaka canonical
ООО «РусБИТех-Астра»
commercial·RUaka rusbitech-astra
libvnc project
oss-projectaka vnc server, libvnc-server, libvncserver
debian
oss-project·GBaka debian gnu/linux
and 2 more affected products View all →
Exploitability
Official Patch Available
Attack Graph
Products CVE Techniques Tactics
Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.
MITRE ATT&CK
2 techniques Initial Access
Privilege Escalation
References
https://cert-portal.siemens.com/productcert/csaf/ssa-390195.json
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/txt/ssa-390195.txt
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/pdf/ssa-390195.pdf
cert-portal.siemens.com
and 45 more references View all →
Unlock Complete Vulnerability Intelligence
Get the full picture for CVE-2018-20748 and every CVE in our database. Create a free account — no credit card required.
Create Free AccountPlain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows