CVE-2011-1773: virt-v2v before 0.8.4 does not preserve the VNC console password when converting a guest, which allows local u

Q: How do I fix CVE-2011-1773?

virt-v2v: upgrade to newer than 0.8.3; enterprise linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2011-1773 being exploited?

CVE-2011-1773 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2011-1773 affect?

CVE-2011-1773 affects virt-v2v, enterprise linux. Severity is medium (CVSS 4.4). virt-v2v before 0.8.4 does not preserve the VNC console password when converting a guest, which allows local users to bypass the intended VNC authentication by connecting without a password.

Q: How urgent is CVE-2011-1773?

Priority 36/100. Public exploit reference; On your watchlist

Routine

MEDIUM 4.4WATCHLISTUPGRADEMITIGATE

CVE-2011-1773 is a medium-severity flaw (CVSS 4.4) affecting virt-v2v, enterprise linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

virt-v2v before 0.8.4 does not preserve the VNC console password when converting a guest, which allows local users to bypass the intended VNC authentication by connecting without a password.

Why this priority

Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	4.4 (Medium)
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-255
Published	2014-02-08
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: matthew booth · redhat

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2014-02-08 00:55 UTCPublished CVE record published
2026-06-16 23:30 UTCUpdated Record last modified

matthew booth virt-v2v UPGRADE

Affected: <= 0.8.3 · 0.1.0 · 0.2.0 · 0.3.0 · 0.3.2 · 0.4.0 · 0.4.9 · 0.4.10

Fixed in: newer than 0.8.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy virt-v2v || rpm -q virt-v2v || virt-v2v --version

2. UPGRADE to newer than 0.8.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade virt-v2v

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade virt-v2v

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

redhat enterprise linux MITIGATE

Affected: 6.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2011-1773?

virt-v2v: upgrade to newer than 0.8.3; enterprise linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2011-1773 being exploited?

CVE-2011-1773 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2011-1773 affect?

CVE-2011-1773 affects virt-v2v, enterprise linux. Severity is medium (CVSS 4.4). virt-v2v before 0.8.4 does not preserve the VNC console password when converting a guest, which allows local users to bypass the intended VNC authentication by connecting without a password.

How urgent is CVE-2011-1773?

Priority 36/100. Public exploit reference; On your watchlist

References

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