HOMEVULNERABILITIESCVE-2005-3371
MEDIUM

CVE-2005-3371

NVD-CWE-OtherPublished: October 30, 2005· Updated: Jun 16, 2026

5.1
CVSS v3.1

Official Description

Multiple interpretation error in AVG 7 7.0.323 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."

NVD Source

Technical Analysis

CVE-2005-3371 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityP
IntegrityP
AvailabilityP
AV:N/AC:H/Au:N/C:P/I:P/A:P

Affected Vendors & Products

grisoft1 product(s)
avg antivirus
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://www.securityelf.org/magicbyteadv.html
ADVISORYhttp://www.securityelf.org/magicbyteadv.html

All References (10)

→
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

Quick Facts

CVE IDCVE-2005-3371
CVSS Score5.1 / 10
SeverityMEDIUM
WeaknessNVD-CWE-Other
CISA KEVNo
Affected1 vendor(s)
PublishedOct 30, 2005

Related CVEs (NVD-CWE-Other)

CVE-2003-0509
10.0
CVE-2006-6355
10.0
CVE-2022-4390
10.0
CVE-2007-1015
10.0
CVE-2006-1123
10.0
CVE-2007-3629
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2005-3371 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
← All Vulnerabilities·Search for CVE-2005-3371·NVD