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[SA29096] SurgeFTP "Content-Length" Denial of Service Vulnerability

From: Secunia Security Advisories (sec-advsecunia.com)
Date: Tue Feb 26 2008 - 17:27:05 CST

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TITLE:
SurgeFTP "Content-Length" Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA29096

VERIFY ADVISORY:
http://secunia.com/advisories/29096/

CRITICAL:
Moderately critical

IMPACT:
DoS

WHERE:
From remote

SOFTWARE:
SurgeFTP 2.x
http://secunia.com/product/2927/

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

The vulnerability is caused due to a NULL pointer dereference error
when parsing HTTP headers. This can be exploited to crash an affected
server via an overly large "Content-Length" HTTP header sent to the
administration web server (by default port 7021/TCP).

The vulnerability is confirmed in version 2.3a1. Other versions may
also be affected.

SOLUTION:
Restrict access to trusted users only.

PROVIDED AND/OR DISCOVERED BY:
Luigi Auriemma

ORIGINAL ADVISORY:
http://aluigi.altervista.org/adv/surgeftpizza-adv.txt

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