CVE-2008-1837: libclamunrar in ClamAV before 0.93 allows remote attackers to cause a denial of service (crash) via crafted RA

Q: How do I fix CVE-2008-1837?

clamav: upgrade to newer than 0.92.1. Exact commands for each OS are on this page.

Q: Is CVE-2008-1837 being exploited?

CVE-2008-1837 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-2008-1837 affect?

CVE-2008-1837 affects clamav. Severity is medium (CVSS 5.0). libclamunrar in ClamAV before 0.93 allows remote attackers to cause a denial of service (crash) via crafted RAR files that trigger "memory problems," as demonstrated by the PROTOS GENOME test suite for Archive Formats.

Q: How urgent is CVE-2008-1837?

Priority 40/100. EPSS top 8%: very likely to be exploited

This month

MEDIUM 5.0UPGRADE

CVE-2008-1837 is a medium-severity flaw (CVSS 5.0) affecting clamav. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

libclamunrar in ClamAV before 0.93 allows remote attackers to cause a denial of service (crash) via crafted RAR files that trigger "memory problems," as demonstrated by the PROTOS GENOME test suite for Archive Formats.

Why this priority

EPSS top 8%: very likely to be exploited

A fixed release or distro patch exists.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	4.8% (top 8%)
CISA exploited list	No
Weakness	CWE-399
Published	2008-04-16
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: clam anti-virus

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

Am I affected?

Timeline

2008-04-16 16:05 UTCPublished CVE record published
2026-06-16 22:52 UTCUpdated Record last modified

clam anti-virus clamav UPGRADE

Affected: <= 0.92.1 · 0.15 · 0.20 · 0.21 · 0.22 · 0.23 · 0.24 · 0.51

Fixed in: newer than 0.92.1

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 0.92.1 (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.

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-2008-1837?

clamav: upgrade to newer than 0.92.1. Exact commands for each OS are on this page.

Is CVE-2008-1837 being exploited?

CVE-2008-1837 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-2008-1837 affect?

CVE-2008-1837 affects clamav. Severity is medium (CVSS 5.0). libclamunrar in ClamAV before 0.93 allows remote attackers to cause a denial of service (crash) via crafted RAR files that trigger "memory problems," as demonstrated by the PROTOS GENOME test suite for Archive Formats.

How urgent is CVE-2008-1837?

Priority 40/100. EPSS top 8%: very likely to be exploited

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References

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