CVE intelligence and bounded remediation

CVE-2019-8277 — Uvnc Ultravnc security vulnerability

High CVSS 7.5

UltraVNC revision 1211 contains multiple memory leaks (CWE-665) in VNC server code, which allows an attacker to read stack memory and can be abused for information disclosure. Combined with another vulnerability, it can be used to leak stack memory and bypass ASLR. This attack appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1212.

Severity
High
CVSS
7.5 (3.1)
Published
2019-03-08
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-665

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

Information disclosure and sensitive data exposure

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Trace sensitive data through responses, errors, logs, metrics, traces, caches, exports, files, backups, and client bundles.
  • Identify affected subjects, tenants, retention windows, access controls, and downstream copies without opening unnecessary sensitive records.
  • Review metadata, timing, status, length, and existence signals as well as direct content disclosure.

Remediate safely

  • Minimize collection and output, apply field-level authorization and redaction at a centralized boundary, and return generic external errors.
  • Remove secrets and sensitive data from logs, artifacts, URLs, caches, and client-side bundles; rotate credentials that may have been exposed.
  • Update the affected component and add synthetic-data tests for response, error, observability, and export paths.

Authoritative sources

Complete CVE record and remediation plan

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