CVE-2007-4510: ClamAV before 0.91.2, as used in Kolab Server 2.0 through 2.2beta1 and other products, allows remote attackers

Routine

MEDIUM 4.3UPGRADEDOWNGRADE

CVE-2007-4510 is a medium-severity flaw (CVSS 4.3) affecting clamav, kolab server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ClamAV before 0.91.2, as used in Kolab Server 2.0 through 2.2beta1 and other products, allows remote attackers to cause a denial of service (application crash) via (1) a crafted RTF file, which triggers a NULL dereference in the cli_scanrtf function in libclamav/rtf.c; or (2) a crafted HTML document with a data: URI, which triggers a NULL dereference in the cli_html_normalise function in libclamav/htmlnorm.c. NOTE: some of these details are obta

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	2.0% (top 20%)
CISA exploited list	No
Published	2007-08-23
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: clam anti-virus · kolab

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

Am I affected?

Timeline

2007-08-23 19:17 UTCPublished CVE record published
2026-06-16 22:44 UTCUpdated Record last modified

clam anti-virus clamav UPGRADE

Affected: <= 0.91.2

Fixed in: newer than 0.91.2

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 0.91.2 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade clamav

Note

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

kolab kolab server DOWNGRADE

Affected: 2.0 · 2.0.1 · 2.0.2 · 2.0.3 · 2.0.4 · 2.1 · 2.2beta1

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0

1. Check installed version

apt-cache policy kolab-server || rpm -q kolab-server || kolab-server --version

2. No fixed release: DOWNGRADE to a release before 2.0 (Debian / Ubuntu)

apt-cache madison kolab-server sudo apt install kolab-server=<VERSION_BEFORE_2.0> sudo apt-mark hold kolab-server

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

dnf --showduplicates list kolab-server sudo dnf downgrade kolab-server-<VERSION_BEFORE_2.0> sudo dnf versionlock add kolab-server

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.

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-2007-4510?

clamav: upgrade to newer than 0.91.2; kolab server: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2007-4510 being exploited?

CVE-2007-4510 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-2007-4510 affect?

CVE-2007-4510 affects clamav, kolab server. Severity is medium (CVSS 4.3). ClamAV before 0.91.2, as used in Kolab Server 2.0 through 2.2beta1 and other products, allows remote attackers to cause a denial of service (application crash) via (1) a crafted RTF file, which triggers a NULL dereference in the cli_scanrtf

How urgent is CVE-2007-4510?

Priority 35/100. No elevated risk signals yet.

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References

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