TITLE:
Microsoft Windows FTP Client Filename Validation Vulnerability

SECUNIA ADVISORY ID:
SA17163

VERIFY ADVISORY:
http://secunia.com/advisories/17163/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
>From remote

OPERATING SYSTEM:
Microsoft Windows XP Professional
http://secunia.com/product/22/
Microsoft Windows XP Home Edition
http://secunia.com/product/16/
Microsoft Windows Server 2003 Web Edition
http://secunia.com/product/1176/
Microsoft Windows Server 2003 Standard Edition
http://secunia.com/product/1173/
Microsoft Windows Server 2003 Enterprise Edition
http://secunia.com/product/1174/
Microsoft Windows Server 2003 Datacenter Edition
http://secunia.com/product/1175/

SOFTWARE:
Microsoft Internet Explorer 6.x
http://secunia.com/product/11/

DESCRIPTION:
A vulnerability has been reported in Microsoft Windows, which can be
exploited by malicious people to compromise a user's system.

The vulnerability is caused due to an error in the Windows FTP client
in validating the name of a downloaded file. This can be exploited to
write files into arbitrary locations on an affected system.

Successful exploitation requires that the user is e.g. tricked into
downloading a file with a specially-crafted filename from an FTP
server.

The vulnerability may be related to:
SA13704

SOLUTION:
Apply patches.

Microsoft Windows XP (requires Service Pack 1):
http://www.microsoft.com/downloads/details.aspx?FamilyId=351C63A3-AB62-418D-8678-3AF791D73A29

Microsoft Windows Server 2003:
http://www.microsoft.com/downloads/details.aspx?FamilyId=4940CF64-E1FD-4E88-8980-3106BE03BF12

Microsoft Windows Server 2003 (Itanium):
http://www.microsoft.com/downloads/details.aspx?FamilyId=B715147B-DE2D-4F14-9548-AFF18641D0F3

Internet Explorer 6 Service Pack 1 on Microsoft Windows 2000
(requires Service Pack 4):
http://www.microsoft.com/downloads/details.aspx?FamilyId=FCEA60E5-9EA8-4216-BA4D-C85054892DBB

ORIGINAL ADVISORY:
MS05-044 (KB905495):
http://www.microsoft.com/technet/security/Bulletin/MS05-044.mspx

OTHER REFERENCES:
SA13704:
http://secunia.com/advisories/13704

----------------------------------------------------------------------

About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

----------------------------------------------------------------------

Unsubscribe: Secunia Security Advisories
http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org

----------------------------------------------------------------------