CVE-2008-3243: Multiple unspecified vulnerabilities in the scanning engine before 4.4.4 in F-Prot Antivirus before 6.0.9.0 al

Q: How do I fix CVE-2008-3243?

f-prot antivirus: downgrade or apply the listed mitigation; scanning engine: upgrade to newer than 4.3.2. Exact commands for each OS are on this page.

Q: Is CVE-2008-3243 being exploited?

CVE-2008-3243 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-2008-3243 affect?

CVE-2008-3243 affects f-prot antivirus, scanning engine. Severity is medium (CVSS 4.3). Multiple unspecified vulnerabilities in the scanning engine before 4.4.4 in F-Prot Antivirus before 6.0.9.0 allow remote attackers to cause a denial of service via (1) a crafted UPX-compressed file, which triggers an engine crash; (2) a cra

Q: How urgent is CVE-2008-3243?

Priority 36/100. No elevated risk signals yet.

Routine

MEDIUM 4.3DOWNGRADEUPGRADE

CVE-2008-3243 is a medium-severity flaw (CVSS 4.3) affecting f-prot antivirus, scanning engine. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple unspecified vulnerabilities in the scanning engine before 4.4.4 in F-Prot Antivirus before 6.0.9.0 allow remote attackers to cause a denial of service via (1) a crafted UPX-compressed file, which triggers an engine crash; (2) a crafted Microsoft Office file, which triggers an infinite loop; or (3) an ASPack-compressed file, which triggers an engine crash.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	2.1% (top 18%)
CISA exploited list	No
Weakness	CWE-20
Published	2008-07-21
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

2008-07-21 16:41 UTCPublished CVE record published
2026-06-16 22:55 UTCUpdated Record last modified

f-prot f-prot antivirus DOWNGRADE

Affected: 3.11b · 3.12 · 3.12a · 3.12b · 3.12c · 3.12d · 3.13 · 3.13a

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.11b

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 3.11b (Debian / Ubuntu)

apt-cache madison f-prot-antivirus sudo apt install f-prot-antivirus=<VERSION_BEFORE_3.11b> 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_3.11b> 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 UPGRADE

Affected: <= 4.3.2

Fixed in: newer than 4.3.2

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 4.3.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade scanning-engine

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade scanning-engine

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-2008-3243?

f-prot antivirus: downgrade or apply the listed mitigation; scanning engine: upgrade to newer than 4.3.2. Exact commands for each OS are on this page.

Is CVE-2008-3243 being exploited?

CVE-2008-3243 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-2008-3243 affect?

CVE-2008-3243 affects f-prot antivirus, scanning engine. Severity is medium (CVSS 4.3). Multiple unspecified vulnerabilities in the scanning engine before 4.4.4 in F-Prot Antivirus before 6.0.9.0 allow remote attackers to cause a denial of service via (1) a crafted UPX-compressed file, which triggers an engine crash; (2) a cra

How urgent is CVE-2008-3243?

Priority 36/100. No elevated risk signals yet.

Software pages

Microsoft Office vulnerabilities

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References

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