CVE intelligence and bounded remediation

CVE-2019-8275 — Uvnc Ultravnc security vulnerability

Critical CVSS 9.8

UltraVNC revision 1211 has multiple improper null termination vulnerabilities in VNC server code, which result in out-of-bound data being accessed by remote users. This attack appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1212.

Severity
Critical
CVSS
9.8 (3.1)
Published
2019-03-08
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-170

Affected products

  • uvnc / ultravnc
  • siemens / sinumerik_access_mymachine/p2p
  • siemens / sinumerik_pcu_base_win10_software/ipc
  • siemens / sinumerik_pcu_base_win7_software/ipc

Matched remediation archetype

General vulnerability remediation

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Check exposure

  • Confirm the affected component, deployment paths, reachable interfaces, and enabled features from inventories and configuration, without probing production destructively.
  • Compare the advisory's affected conditions with the repository lockfiles, build manifests, artifacts, and runtime inventory.
  • Identify data sensitivity, trust boundaries, and privilege level for every confirmed affected deployment.

Remediate safely

  • Apply a vendor-supported fix or remove the affected component or feature; record the selected change and its source in the repository.
  • Update direct and transitive dependency locks, generated artifacts, deployment manifests, and asset inventories together.
  • Add a regression test for the documented unsafe condition using inert inputs and preserve rollback instructions.

Authoritative sources

Complete CVE record and remediation plan

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