CVE-2005-3381

MediumCVSS 5.0/10Last modified Jun 16, 2026

Description

Multiple interpretation error in Ukrainian National Antivirus (UNA) 1.83.2.16 with kernel 265 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."

Metrics

CVSS 2.0 5.0/10AV:N/AC:L/Au:N/C:N/I:P/A:N

Affected software

No affected versions have been published.

Timeline

Published
Oct 30, 2005
Last modified
Jun 16, 2026
NVD status
Modified

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