TITLE:
TFTPD32 Request Error Message Format String Vulnerability

SECUNIA ADVISORY ID:
SA18539

VERIFY ADVISORY:
http://secunia.com/advisories/18539/

CRITICAL:
Less critical

IMPACT:
DoS

WHERE:
>From local network

SOFTWARE:
Tftpd32 2.x
http://secunia.com/product/774/

DESCRIPTION:
mircia has discovered a vulnerability in TFTPD32, which can be
exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to a format string error when the
filename received in a TFTP request is used to construct an error
message. This can be exploited to crash the application via a TFTP
request packet containing a specially crafted filename e.g.
"%.1000X".

The vulnerability has been confirmed in version 2.81. Other versions
may also be affected.

SOLUTION:
Use the product on trusted networks only.

PROVIDED AND/OR DISCOVERED BY:
mircia, Critical Security Team.

ORIGINAL ADVISORY:
http://www.critical.lt/research/tftpd32_281_dos.txt

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