[17848] in bugtraq
AnalogX Proxy Server Buffer Overflow Vulnerability
daemon@ATHENA.MIT.EDU (Elias Levy)
Wed Nov 29 16:51:26 2000
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Message-Id: <20001123100232.A19620@securityfocus.com>
Date: Thu, 23 Nov 2000 10:02:32 -0800
Reply-To: aleph1@SECURITYFOCUS.COM
From: Elias Levy <aleph1@SECURITYFOCUS.COM>
To: BUGTRAQ@SECURITYFOCUS.COM
From "zer0-logic" <zer0logic@privacyx.com>:
Network Security Solutions Inc. Security Advisory
( Philippine based Security Company )
Http://www.nssolution.net
Http://connect.to/nssi
]** AnalogX Proxy Server DoS/Buffer Overflow Vulnerabilty **[
Author: Abraham Lincoln H.
Handle: zer0logic
Email : Abraham@Nssolution.net, zer0logic@Privacyx.Com
lincoln@privacyX.com, KnowledgeBase@Lycos.com
Date Discovered: November 15, 2000
Vendor: AnalogX.Com
Version Affected: AnalogX Proxy Server release 4.10
for Win 95 / 98 / NT / Win2k
Local : Yes
Remote: Yes
Risk: High
Problem Description:
NSSI Team has discovered a Local/Remote Buffer Overflow/DoS
Vulnerabiltiy on AnalogX Proxy Server that could allow a Malicious
Attacker to disable the whole proxy server by just attacking a single
analogX proxy service.
Vulnerable Proxy Services; FTP, POP3, SMTP and Proxy Logger
The Problem lies when FTP Service is ON and Logging is enabled or
disabled, or SMTP Service is ON and Logging is enabled or disabled, POP3
Service is ON and logging is enabled. When the Attacker Sends a Multiple
Abnormal Strings to a certain affected service it causes the whole Proxy to Shutd0wn.
the proxy needs to re-start again to perform normal operation.
OUTPUT Error Message when Logging is Disabled:
FTP Service error msg.:
ABORT: Memory corrupt before (10241)
(PROTO\ftp.c\523)
SMTP Service error msg.:
ABORT: Memory corrupt before (10241)
(PROTO\smtp.c\379)
OUTPUT Error message when Logging is Enabled:
FTP Service error msg.:
ABORT: Last String too large for Buffer (1509 > 1024)
(log.c/114)
POP3 Service error msg.:
ABORT: Last String too large for Buffer (1509 > 1024)
(log.c/114)
SMTP Service error msg.:
ABORT: Last String too large for Buffer (10301 > 1024)
(log.c/114)
NOT Affected Services:
HTTP Proxy: 6588
Socks Proxy: 1080
NNTP: 119
Work Around:
Disable FTP Proxy service
Disable SMTP Proxy service
Disable POP3 Proxy service if Logging is enabled
Vendor Status: AnalogX has been notified of this Vulnerability but no patch has been issued.
Related Links: Http://www.nssolution.net
Http://connect.to/nssi
Feedback and Inquiries:
If you have any questions, inquiries, feedback, concerns and
updates pls don't hesitate to email us.
For Inquiries,Concerns and updates - Info@nssolution.net
for Comments and Questions - Abraham@nssolution.net, lincoln@privacyx.com
zer0logic@privacyx.com
Disclaimer:
This paper is intended for informational purpose only. We are not
responsible for the the Use and/or potential effects of these advisories.
Read this at your own risk or not at all.
Copyright(c) 2000-2001 Network Security Solutions Inc.
Permission is herby granted for the redistribution of this alert
electronically. if you wish to reprint or modify this document Contact us
1st or email us at: info@nssolution.net
