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CVE-2005-3371· NVD / CVE Program· CNA mitre

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 a

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."

MediumCVSS 5.1 · v2.0—No exploit No fix recorded
Published
Oct 30, 2005
Updated
Jun 16, 2026
EPSS
1.4% · 70th percentile
CWE
—
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Report tools

JSON

Action score

20

Monitor

Low priority for now.

CVSS
20 / 40 · 5.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.4%

Affected systems

VendorProduct
grisoftavg antivirus

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • grisoft avg antivirus7.0.323

Same product

grisoft: all records

Other highest-scoring records for the same primary product.

  • CVE-2006-5938Grisoft AVG Anti-Virus before 7.1.407 has unknown impact and remote attack vectors involving an uninitialized variable and a crafted CAB fil
    41Plan
  • CVE-2006-5940Unspecified vulnerability in Grisoft AVG Anti-Virus before 7.1.407 has unknown impact and remote attack vectors related to "Integer Issues"
    41Plan
  • CVE-2006-5939Grisoft AVG Anti-Virus before 7.1.407 allows remote attackers to cause a denial of service (crash) via a crafted DOC file that triggers a di
    32Monitor
  • CVE-2006-5937Multiple integer overflows in Grisoft AVG Anti-Virus before 7.1.407 allow remote attackers to execute arbitrary code via crafted (1) CAB or
    31Monitor
  • CVE-2007-3777avg7core.sys 7.5.0.444 in Grisoft AVG Anti-Virus 7.5.448 and Free Edition 7.5.446, provides an internal function that copies data to an arbi
    28Monitor
  • CVE-2008-3373The files parsing engine in Grisoft AVG Anti-Virus before 8.0.156 allows remote attackers to cause a denial of service (engine crash) via a
    21Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
P · data can be read
Integrity
P · data or configuration can be modified
Availability
P · the service can be disrupted
Attack complexity
High
Confidentiality impact
P
Integrity impact
P
Availability impact
P

Weakness class (CWE)

—

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records