CVE-2006-1656: vserver in util-vserver 0.30.209 executes a command as root when the suexec userid parameter is invalid and no

Q: How do I fix CVE-2006-1656?

util-vserver: upgrade to newer than 0.30.210. Exact commands for each OS are on this page.

Q: Is CVE-2006-1656 being exploited?

CVE-2006-1656 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-2006-1656 affect?

CVE-2006-1656 affects util-vserver. Severity is high (CVSS 7.2). vserver in util-vserver 0.30.209 executes a command as root when the suexec userid parameter is invalid and non-numeric, which might cause local users to inadvertently execute dangerous commands as root.

Routine

HIGH 7.2UPGRADE

CVE-2006-1656 is a high-severity flaw (CVSS 7.2) affecting util-vserver. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

vserver in util-vserver 0.30.209 executes a command as root when the suexec userid parameter is invalid and non-numeric, which might cause local users to inadvertently execute dangerous commands as root.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.2 (High)
EPSS exploit chance	0.4% (top 71%)
CISA exploited list	No
Published	2006-04-06
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: vserver

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

Am I affected?

Timeline

2006-04-06 10:04 UTCPublished CVE record published
2026-06-16 22:23 UTCUpdated Record last modified

vserver util-vserver UPGRADE

Affected: <= 0.30.210 · 0.30.209

Fixed in: newer than 0.30.210

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy util-vserver || rpm -q util-vserver || util-vserver --version

2. UPGRADE to newer than 0.30.210 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade util-vserver

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade util-vserver

Note

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

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-2006-1656?

util-vserver: upgrade to newer than 0.30.210. Exact commands for each OS are on this page.

Is CVE-2006-1656 being exploited?

CVE-2006-1656 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-2006-1656 affect?

CVE-2006-1656 affects util-vserver. Severity is high (CVSS 7.2). vserver in util-vserver 0.30.209 executes a command as root when the suexec userid parameter is invalid and non-numeric, which might cause local users to inadvertently execute dangerous commands as root.

How urgent is CVE-2006-1656?

Priority 33/100. High severity

Related CVEs

CVE-2005-4418 HIGH 7.5 DOWNGRADE util-vserver before 0.30.208-1 with kernel-patch-vserver before 1.9.5.5 and 2.x before 2.3 for Debian GNU/Linu

References

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