CVE-2009-4444
Last modified
CVE-2009-4444 is a vulnerability of currently unknown severity. Microsoft Internet Information Services (IIS) 5.x and 6.x uses only the portion of a filename before a ; (semicolon) character to determine the file extension, which allows remote attackers to bypass intended extension restrictions of third-party upload applications via a filename with a (1) .asp, (2) .cer, or (3) .asa first extension, followed by a semicolon and a safe extension, as demonstrated by the use of asp.dll to handle a .asp;.jpg file.. EPSS estimates a 63.63% chance of exploitation in the next 30 days.
Description
Microsoft Internet Information Services (IIS) 5.x and 6.x uses only the portion of a filename before a ; (semicolon) character to determine the file extension, which allows remote attackers to bypass intended extension restrictions of third-party upload applications via a filename with a (1) .asp, (2) .cer, or (3) .asa first extension, followed by a semicolon and a safe extension, as demonstrated by the use of asp.dll to handle a .asp;.jpg file.
Metrics
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Internet Information Services | 5.0 |
| Microsoft | Internet Information Services | 6.0 |
References
- http://secunia.com/advisories/37831Third Party Advisory
- http://securitytracker.com/id?1023387Third Party Advisory, VDB Entry
- http://soroush.secproject.com/downloadable/iis-semicolon-report.pdfThird Party Advisory
- http://www.securityfocus.com/bid/37460Third Party Advisory, VDB Entry
- http://www.vupen.com/english/advisories/2009/3634Third Party Advisory
- http://secunia.com/advisories/37831Third Party Advisory
- http://securitytracker.com/id?1023387Third Party Advisory, VDB Entry
- http://soroush.secproject.com/downloadable/iis-semicolon-report.pdfThird Party Advisory
- http://www.securityfocus.com/bid/37460Third Party Advisory, VDB Entry
- http://www.vupen.com/english/advisories/2009/3634Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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