CVE-2008-3447: The scanning engine in F-Prot Antivirus 6.2.1 4252 allows remote attackers to cause a denial of service (infin

This month

MEDIUM 5.0DOWNGRADEDOWNGRADE

CVE-2008-3447 is a medium-severity flaw (CVSS 5.0) affecting f-prot antivirus, scanning engine. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The scanning engine in F-Prot Antivirus 6.2.1 4252 allows remote attackers to cause a denial of service (infinite loop) via a malformed ZIP archive, probably related to invalid offsets.

Why this priority

EPSS top 5%: very likely to be exploited
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	7.9% (top 5%)
CISA exploited list	No
Weakness	CWE-399
Published	2008-08-04
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: f-prot

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

Am I affected?

Timeline

2008-08-04 17:41 UTCPublished CVE record published
2026-06-16 22:55 UTCUpdated Record last modified

f-prot f-prot antivirus DOWNGRADE

Affected: 6.2.1.4252

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.2.1.4252

1. Check installed version

apt-cache policy f-prot-antivirus || rpm -q f-prot-antivirus || f-prot-antivirus --version

2. No fixed release: DOWNGRADE to a release before 6.2.1.4252 (Debian / Ubuntu)

apt-cache madison f-prot-antivirus sudo apt install f-prot-antivirus=<VERSION_BEFORE_6.2.1.4252> sudo apt-mark hold f-prot-antivirus

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list f-prot-antivirus sudo dnf downgrade f-prot-antivirus-<VERSION_BEFORE_6.2.1.4252> sudo dnf versionlock add f-prot-antivirus

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

f-prot scanning engine DOWNGRADE

Affected: 4.4.4.56

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.4.4.56

1. Check installed version

apt-cache policy scanning-engine || rpm -q scanning-engine || scanning-engine --version

2. No fixed release: DOWNGRADE to a release before 4.4.4.56 (Debian / Ubuntu)

apt-cache madison scanning-engine sudo apt install scanning-engine=<VERSION_BEFORE_4.4.4.56> sudo apt-mark hold scanning-engine

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list scanning-engine sudo dnf downgrade scanning-engine-<VERSION_BEFORE_4.4.4.56> sudo dnf versionlock add scanning-engine

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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: F-PROT AntiVirus 6.2.1.4252 - Malformed Archive Infinite Loop Denial of Service

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-2008-3447?

f-prot antivirus: downgrade or apply the listed mitigation; scanning engine: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2008-3447 being exploited?

CVE-2008-3447 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-2008-3447 affect?

CVE-2008-3447 affects f-prot antivirus, scanning engine. Severity is medium (CVSS 5.0). The scanning engine in F-Prot Antivirus 6.2.1 4252 allows remote attackers to cause a denial of service (infinite loop) via a malformed ZIP archive, probably related to invalid offsets.

How urgent is CVE-2008-3447?

Priority 46/100. EPSS top 5%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2012-1460 MEDIUM 4.3 DOWNGRADE DOWNGRADE The Gzip file parser in Antiy Labs AVL SDK 2.0.3.7, Quick Heal (aka Cat QuickHeal) 11.00, Command Antivirus 5.
CVE-2012-1431 MEDIUM 4.3 DOWNGRADE DOWNGRADE The ELF file parser in Bitdefender 7.2, Command Antivirus 5.2.11.5, Comodo Antivirus 7424, eSafe 7.0.17.0, F-P
CVE-2012-1426 MEDIUM 4.3 DOWNGRADE DOWNGRADE The TAR file parser in Quick Heal (aka Cat QuickHeal) 11.00, Command Antivirus 5.2.11.5, F-Prot Antivirus 4.6.
CVE-2012-1423 MEDIUM 4.3 DOWNGRADE DOWNGRADE The TAR file parser in Command Antivirus 5.2.11.5, Emsisoft Anti-Malware 5.1.0.1, F-Prot Antivirus 4.6.2.117,
CVE-2012-1420 MEDIUM 4.3 DOWNGRADE DOWNGRADE The TAR file parser in Quick Heal (aka Cat QuickHeal) 11.00, Command Antivirus 5.2.11.5, F-Prot Antivirus 4.6.

References

← Back to latest CVEs