CVE-2005-3399

Quick Heal vulnerability

CVSS

5.0

EPSS

7.8%

EPSS pct

94th

Exploited

No known

Multiple interpretation error in CAT-QuickHeal 8.0 allows remote attackers to bypass virus scanning via a file such as BAT, HTML, and EML with an "MZ" magic byte sequence which is normally associated with EXE, which causes the file to be treated as a safe type that could still be executed as a dangerous file type by applications on the end system, as demonstrated by a "triple headed" program that contains EXE, EML, and HTML content, aka the "magic byte bug."

Affected vendor

Cat

Affected product

Quick Heal

CVSS vector

AV:N/AC:L/Au:N/C:N/I:P/A:N

Published

2005-11-01

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no authentication. Successful exploitation leads to partial impact to integrity.

Its EPSS score of 7.8% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 94% of all scored CVEs.

Check your external exposure to CVE-2005-3399

Confirm whether Cat Quick Heal is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2005-3399.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2005-3399

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2005-3399 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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