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Vulnerability record · CVE-2005-3399 · published 1 November 2005

CVE-2005-3399: Cat quick heal vulnerability

Cat · Quick Heal

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."

5.0 CVSS 2.0 Medium EPSS 7.8% · top 5.5%
5.0CVSS 2.0 base score
7.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
16 Jun 2026Last modified by NVD

Description

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."

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

Track CVE-2005-3399 inside VULONE

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

5.1CVE-2005-3231Cat quick heal vulnerabilityMultiple interpretation error in unspecified versions of CAT Quick Heal allows remote attackers to bypass virus detection via a malicious executable …EPSS 14%4.3CVE-2012-1456Antivirus TAR parsers bypassed by appended ZIP fileMultiple antivirus products parse TAR archives in a way that lets a TAR file with an appended ZIP evade malware detection. An attacker can therefore …EPSS 100%analysed4.3CVE-2012-1457Antivirus TAR parser malware detection bypass via oversized length fieldThe TAR file parser in numerous antivirus and anti-malware products mishandles a TAR archive entry whose length field exceeds the total TAR file size…EPSS 98%analysed4.3CVE-2012-1459TAR parser malware detection bypass in multiple antivirus productsThe TAR file parser in dozens of antivirus products mishandles a TAR archive entry whose length field spans the entire entry plus part of the next en…EPSS 100%analysed4.3CVE-2012-1460Gzip parser in multiple antivirus engines allows malware detection bypassThe Gzip file parser in several antivirus products mishandles .tar.gz archives containing stray bytes at the end, allowing malware to evade detection…EPSS 94%analysed4.3CVE-2012-1462ZIP parser in multiple antivirus products allows malware detection bypassThe ZIP file parser in numerous antivirus and endpoint protection products mishandles a ZIP archive containing an invalid data block at the beginning…EPSS 98%analysed4.3CVE-2012-1463Multiple antivirus ELF parsers bypassed via modified endianness fieldThe ELF file parser in a dozen antivirus products (AhnLab V3, Bitdefender, Quick Heal, Command, Comodo, eSafe, F-Prot, F-Secure, McAfee, Norman, nPro…EPSS 94%analysed4.3CVE-2012-1442Multiple antivirus ELF parsers allow malware detection bypass via modified class fieldThe ELF file parser in numerous antivirus products (Quick Heal, McAfee, eSafe, Kaspersky, F-Secure, Sophos, Antiy AVL SDK, Rising, Fortinet, Panda) m…EPSS 99%analysed

Source: NIST National Vulnerability Database (record CVE-2005-3399), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.