Avirt Voice Has a Remote Buffer Overflow
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SecurityTracker Alert ID: 1009190
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CVE Reference: CAN-2004-0315
(Links to External Site)
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Updated: Mar 23 2004
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Original Entry Date: Feb 24 2004
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Impact: Denial of service via network, Execution of arbitrary code via network, User access via network
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Exploit Included: Yes
Vendor Confirmed: Yes
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Version(s): 4.0
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Description: A buffer overflow vulnerability was reported in Avirt Voice. A remote user may be able to cause the application to crash or execute arbitrary code.
Donato Ferrante reported that a remote user can send a specially crafted request to the target system on TCP port 1080 to trigger a buffer overflow.
A demonstration exploit request is provided:
GET aaaa[ 1113 of a ]aaaa
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Impact: A remote user may be able to cause the application to crash or potentially execute arbitrary code [however, the report did not disclose the specific impact.]
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Solution: No solution was available at the time of this entry. The vendor reportedly plans to issue a fix in the next version of the product.
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Vendor URL: www.avirt.com/products/voice.html (Links to External Site)
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Cause: Boundary error
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Underlying OS: Windows (Any)
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Reported By: "Donato Ferrante" <fdonato@autistici.org>
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Message History:
None.
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Source Message Contents
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Date: Mon, 23 Feb 2004 09:07:37 -0000
From: "Donato Ferrante" <fdonato@autistici.org>
Subject: Remote Buffer Overflow in Avirt Voice 4.0
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Donato Ferrante
Application: Avirt Voice
http://www.avirt.com/
Version: 4.0
Bug: Remote Buffer Overflow
Author: Donato Ferrante
e-mail: fdonato@autistici.org
web: www.autistici.org/fdonato
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1. Description
2. The bug
3. The code
4. The fix
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1. Description:
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Vendor's Description:
"Avirt Voice acts as an H.323 gateway between IP networks. It allows
users to operate H.323 applications, like Microsoft NetMeeting, Intel
Video Phone, or Netspeak Webphone, from behind a firewall.
Because Voice is a software solution, it is more easily scalable and
much less expensive than hardware alternatives."
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2. The bug:
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The program doesn't well manage the received strings on the TCP port
1080. In fact it will have a buffer overflow.
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3. The code:
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To test the vulnerability simply send to the server ( port 1080 ) a
string like:
GET aaaa[ 1113 of a ]aaaa
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4. The fix:
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Vendor was contacted.
Bug will be fixed in the next version of Avirt Voice.
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