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AT-TFTP Server Long Filename Buffer Overflow Vulnerability
Secunia Advisory: SA23106
Release Date: 2006-11-28
Last Update: 2006-12-04
Popularity: 6,137 views

Critical:
Moderately critical
Impact: System access
Where: From local network
Solution Status: Unpatched

Software:AT-TFTP Server 1.x

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CVE reference:CVE-2006-6184


Description:
A vulnerability has been discovered in AT-TFTP Server, which can be exploited by malicious people to compromise a vulnerable system.

The vulnerability is caused due to a boundary error during the processing of TFTP Read/Write request packet types. This can be exploited to cause a stack-based buffer overflow by sending a specially crafted packet with an overly long filename field (more than 227 bytes).

Successful exploitation allows execution of arbitrary code.

The vulnerability is confirmed in version 1.9 and also reported in version 1.8. Other versions may also be vulnerable.

Solution:
Use in a trusted network environment only.

Provided and/or discovered by:
Originally discovered in version 1.8 by:
Luigi Auriemma

Re-discovered in version 1.9 by:
Liu Qixu, NCNIPC

Changelog:
2006-11-29: Updated credits and added information about version 1.8.
2006-12-04: Added CVE reference.

Original Advisory:
http://aluigi.altervista.org/adv/attftp-adv.txt


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