CVE-2006-0855: Stack-based buffer overflow in the fullpath function in misc.c for zoo 2.10 and earlier, as used in products s

Q: How do I fix CVE-2006-0855?

zoo: upgrade to newer than 2.10. Exact commands for each OS are on this page.

Q: Is CVE-2006-0855 being exploited?

CVE-2006-0855 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-2006-0855 affect?

CVE-2006-0855 affects zoo. Severity is medium (CVSS 5.1). Stack-based buffer overflow in the fullpath function in misc.c for zoo 2.10 and earlier, as used in products such as Barracuda Spam Firewall, allows user-assisted attackers to execute arbitrary code via a crafted ZOO file that causes the co

Q: How urgent is CVE-2006-0855?

Priority 46/100. EPSS top 8%: very likely to be exploited; Public exploit reference

This month

MEDIUM 5.1UPGRADE

CVE-2006-0855 is a medium-severity flaw (CVSS 5.1) affecting zoo. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Stack-based buffer overflow in the fullpath function in misc.c for zoo 2.10 and earlier, as used in products such as Barracuda Spam Firewall, allows user-assisted attackers to execute arbitrary code via a crafted ZOO file that causes the combine function to return a longer string than expected.

Why this priority

EPSS top 8%: very likely to be exploited
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.1 (Medium)
EPSS exploit chance	4.5% (top 8%)
CISA exploited list	No
Weakness	CWE-119
Published	2006-02-23
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: rahul dhesi

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

Am I affected?

Timeline

2006-02-23 21:02 UTCPublished CVE record published
2026-06-16 22:21 UTCUpdated Record last modified

rahul dhesi zoo UPGRADE

Affected: <= 2.10

Fixed in: newer than 2.10

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy zoo || rpm -q zoo || zoo --version

2. UPGRADE to newer than 2.10 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade zoo

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade zoo

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-2006-0855?

zoo: upgrade to newer than 2.10. Exact commands for each OS are on this page.

Is CVE-2006-0855 being exploited?

CVE-2006-0855 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-2006-0855 affect?

CVE-2006-0855 affects zoo. Severity is medium (CVSS 5.1). Stack-based buffer overflow in the fullpath function in misc.c for zoo 2.10 and earlier, as used in products such as Barracuda Spam Firewall, allows user-assisted attackers to execute arbitrary code via a crafted ZOO file that causes the co

How urgent is CVE-2006-0855?

Priority 46/100. EPSS top 8%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2006-1269 MEDIUM 6.2 DOWNGRADE Buffer overflow in the parse function in parse.c in zoo 2.10 might allow local users to execute arbitrary code
CVE-2005-2349 HIGH 7.5 DOWNGRADE Zoo 2.10 has Directory traversal

References

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