CVE-2006-4018

CVE-2006-4018 is a high-severity vulnerability in Clamav with a CVSS 2.0 base score of 7.5. Its EPSS exploit-prediction score of 19% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-119.

Key facts

Description

Heap-based buffer overflow in the pefromupx function in libclamav/upx.c in Clam AntiVirus (ClamAV) 0.81 through 0.88.3 allows remote attackers to execute arbitrary code via a crafted UPX packed file containing sections with large rsize values.

Frequently asked questions

What is CVE-2006-4018?
Heap-based buffer overflow in the pefromupx function in libclamav/upx.c in Clam AntiVirus (ClamAV) 0.81 through 0.88.3 allows remote attackers to execute arbitrary code via a crafted UPX packed file containing sections with large rsize values.
How severe is CVE-2006-4018?
CVE-2006-4018 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2006-4018 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 19% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-4018?
CVE-2006-4018 primarily affects Clamav. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2006-4018?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2006-4018 published?
CVE-2006-4018 was published on 2006-08-08 and last updated on 2026-06-16.

References

Affected products (19)

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