avatar_upload.asp in Avatar MOD 1.3 for Snitz Forums 3.4, and possibly other versions, allows remote attackers to bypass file type checks and upload arbitrary files via a null byte in the file name, as discovered by the Codescan product.
CVSS Severity (version 2.0):
Impact Subscore: 2.9
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows unauthorized modification
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20060517 CodeScan Advisory: Avatar MOD v1.3 for Snitz Forums v3.4 - Arbitrary File Upload
Advisory; Patch Information