TI-2005-03195 Aliases CVE-2005-3371 GHSA-p2fh-pcwg-6jc4

Multiple interpretation error in AVG 7 7.0.323 allows remote attackers to bypass virus…

LOW 26Published 2005-10-29 · Updated 2024-08-07

Key facts

Attack vector: Network
Privileges required: None
User interaction: — Not recorded in CVSS 2.0
Attack complexity: High
Impact type: —
Confidentiality · integrity · availability: Partial · Partial · Partial
Fix status: No fix listed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA.

Summary

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."

Why it matters now

EPSS 0.01352 71st percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:grisoft:avg_antivirus:7.0.323:::::::*	7.0.323	Vulnerable	Grisoft

cpe:2.3:a:grisoft:avg_antivirus:7.0.323:*:*:*:*:*:*:* Versions 7.0.323 Vulnerable ·Grisoft

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2005-3371
2026-10-03 Alias added: GHSA-p2fh-pcwg-6jc4

References

Advisory 1

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

Other 3

TI-2006-05723 Unspecified vulnerability in Grisoft AVG Anti-Virus before 7.1.407 has unknown impact and… CVSS 2.0HIGH 10.0
TI-2006-05721 Grisoft AVG Anti-Virus before 7.1.407 has unknown impact and remote attack vectors… CVSS 2.0HIGH 10.0
TI-2006-05720 Multiple integer overflows in Grisoft AVG Anti-Virus before 7.1.407 allow remote… CVSS 2.0HIGH 7.5
TI-2006-05722 Grisoft AVG Anti-Virus before 7.1.407 allows remote attackers to cause a denial of… CVSS 2.0HIGH 7.8
TI-2007-03664 avg7core.sys 7.5.0.444 in Grisoft AVG Anti-Virus 7.5.448 and Free Edition 7.5.446… CVSS 2.0HIGH 7.2
TI-2008-03234 The files parsing engine in Grisoft AVG Anti-Virus before 8.0.156 allows remote attackers… CVSS 2.0MEDIUM 5.0

See all 8 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences