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TITLE:
TFTP Server SP Long Filename Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA29508

VERIFY ADVISORY:
http://secunia.com/advisories/29508/

CRITICAL:
Moderately critical

IMPACT:
DoS, System access

WHERE:
>From local network

SOFTWARE:
TFTP Server SP 1.x
http://secunia.com/product/18058/

DESCRIPTION:
Mati Aharoni has discovered a vulnerability in TFTP Server SP, which
can be exploited by malicious people to cause a DoS (Denial of
Service) or compromise a vulnerable system.

The vulnerability is caused due to a boundary error in the handling
of filenames and can be exploited to cause a stack-based buffer
overflow via a read or write request with an overly long filename.

Successful exploitation allows execution of arbitrary code.

The vulnerability is confirmed in the Windows version of TFTP Server
SP version 1.4. Other versions may also be affected.

SOLUTION:
Restrict network access to the TFTP service.

PROVIDED AND/OR DISCOVERED BY:
Mati Aharoni

ORIGINAL ADVISORY:
http://www.offensive-security.com/0day/sourceforge-tftpd.py.txt

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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.

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