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TITLE:
Microsoft Internet Information Services FTP Server NLST Buffer
Overflow

SECUNIA ADVISORY ID:
SA36443

VERIFY ADVISORY:
http://secunia.com/advisories/36443/

DESCRIPTION:
Kingcope has discovered a vulnerability in Microsoft Internet
Information Services (IIS), which can be exploited by malicious users
to cause a DoS (Denial of Service) or compromise a vulnerable system.

The vulnerability is caused due to a boundary error in the FTP server
when processing NLST commands. This can be exploited to cause a
stack-based buffer overflow by issuing a specially crafted NLST
command.

Successful exploitation may allow execution of arbitrary code, but
requires a valid FTP user with write access.

The vulnerability is confirmed as a DoS in IIS 5.1 for Windows XP SP3
and in IIS 6.0 for Windows Server 2003, and reported as code execution
in IIS 5.0 for Windows 2000 SP4. Other versions may also be affected.

SOLUTION:
Restrict access to trusted users only.

PROVIDED AND/OR DISCOVERED BY:
Kingcope

ORIGINAL ADVISORY:
http://milw0rm.com/exploits/9541

OTHER REFERENCES:
VU#276653:
http://www.kb.cert.org/vuls/id/276653

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