CVE-2005-3381
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,…
Does this matter?
Lower severity and a low EPSS score (2.13%). Track it; it rarely justifies an emergency change on its own.
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."
- CVSS 2.0
- 5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:P/A:N
- EPSS
- 2.13% probability · 82th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Affected
- ukranian national antivirus/una
- Source
- cve@mitre.org
EPSS 2.1% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://marc.info/?l=bugtraq&m=113026417802703&w=2
- http://www.securityelf.org/magicbyte.html
- http://www.securityelf.org/magicbyteadv.htmlVendor Advisory
- http://www.securityelf.org/updmagic.html
- http://www.securityfocus.com/bid/15189
- http://marc.info/?l=bugtraq&m=113026417802703&w=2
- http://www.securityelf.org/magicbyte.html
- http://www.securityelf.org/magicbyteadv.htmlVendor Advisory
- http://www.securityelf.org/updmagic.html
- http://www.securityfocus.com/bid/15189
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.