CVE-2007-1669: zoo decoder 2.10 (zoo-2.10), as used in multiple products including (1) Barracuda Spam Firewall 3.4 and later

Q: How do I fix CVE-2007-1669?

amavis: upgrade to newer than 2.4.1. Exact commands for each OS are on this page.

Q: Is CVE-2007-1669 being exploited?

CVE-2007-1669 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-2007-1669 affect?

CVE-2007-1669 affects amavis. Severity is high (CVSS 7.8). zoo decoder 2.10 (zoo-2.10), as used in multiple products including (1) Barracuda Spam Firewall 3.4 and later with virusdef before 2.0.6399, (2) Spam Firewall before 3.4 20070319 with virusdef before 2.0.6399o, and (3) AMaViS 2.4.1 and earl

Q: How urgent is CVE-2007-1669?

Priority 56/100. High severity; EPSS top 4%: very likely to be exploited; Public exploit reference

This week

HIGH 7.8UPGRADE

CVE-2007-1669 is a high-severity flaw (CVSS 7.8) affecting amavis. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

zoo decoder 2.10 (zoo-2.10), as used in multiple products including (1) Barracuda Spam Firewall 3.4 and later with virusdef before 2.0.6399, (2) Spam Firewall before 3.4 20070319 with virusdef before 2.0.6399o, and (3) AMaViS 2.4.1 and earlier, allows remote attackers to cause a denial of service (infinite loop) via a ZOO archive with a direntry structure that points to a previous file.

Why this priority

High severity
EPSS top 4%: very likely to be exploited
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
EPSS exploit chance	12.2% (top 4%)
CISA exploited list	No
Published	2007-05-09
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: amavis

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

Am I affected?

Timeline

2007-05-09 00:19 UTCPublished CVE record published
2026-06-16 22:38 UTCUpdated Record last modified

amavis amavis UPGRADE

Affected: <= 2.4.1

Fixed in: newer than 2.4.1

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 2.4.1 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade amavis

Note

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

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: ZOO - '.ZOO' Decompression Infinite Loop Denial of Service (PoC)

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-2007-1669?

amavis: upgrade to newer than 2.4.1. Exact commands for each OS are on this page.

Is CVE-2007-1669 being exploited?

CVE-2007-1669 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-2007-1669 affect?

CVE-2007-1669 affects amavis. Severity is high (CVSS 7.8). zoo decoder 2.10 (zoo-2.10), as used in multiple products including (1) Barracuda Spam Firewall 3.4 and later with virusdef before 2.0.6399, (2) Spam Firewall before 3.4 20070319 with virusdef before 2.0.6399o, and (3) AMaViS 2.4.1 and earl

How urgent is CVE-2007-1669?

Priority 56/100. High severity; EPSS top 4%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2007-1673 HIGH 7.8 UPGRADE UPGRADE unzoo.c, as used in multiple products including AMaViS 2.4.1 and earlier, allows remote attackers to cause a d

References

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