OpenSSH scp Directory Traversal Flaw Lets Remote SSH Servers Overwrite Files in Certain Cases
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SecurityTracker Alert ID: 1011193 |
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SecurityTracker URL: http://securitytracker.com/id/1011193
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CVE Reference:
CAN-2004-0175
(Links to External Site)
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Date: Sep 8 2004
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Impact:
Modification of system information, Modification of user information
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Fix Available: Yes Vendor Confirmed: Yes
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Version(s): prior to 3.4p1
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Description:
An input validation vulnerability was reported in 'scp' in OpenSSH. A remote SSH server can overwrite arbitrary files on the target system in certain situations.
In CLSA-2004:831 (March 2004), Conectiva reported that scp is affected by a directory traversal vulnerability. The same flaw (or a similar flaw) was originally reported by Michal Zalewski in September 2000 as affecting sshd version 1.2.x [CVE: CVE-2000-0992] and was fixed.
The newly reported vulnerability affects OpenSSH versions prior to 3.4p1.
A malicious SSH server can cause files to be written to arbitrary locations on the target user's system when the target user invokes scp against the malicious SSH server.
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Impact:
A remote server can cause files to be written to arbitrary locations on the target user's system when the target user invokes scp against the remote server.
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Solution:
A fix is available in OpenSSH 3.4p1 (or later), available at:
http://openssh.org/
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Vendor URL: openssh.org/ (Links to External Site)
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Cause:
Access control error, Input validation error
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Underlying OS:
Linux (Any), UNIX (Any)
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Message History:
This archive entry has one or more follow-up message(s) listed below.
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Source Message Contents
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Date: Wed, 8 Sep 2004 01:49:39 -0400
Subject: [none]
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In CLSA-2004:831, Conectiva reported that OpenSSH contains a vulnerability in scp. A
remote SSH server can overwrite arbitrary files on the target system in certain
situations.
The flaw (or a similar flaw) was originally reported by Michal Zalewski in September
2000 as affecting sshd version 1.2.x [CVE: CVE-2000-0992] and was fixed.
The newly reported vulnerability affects OpenSSH versions prior to 3.4p1.
A malicious SSH server can cause files to be written to arbitrary locations on the
target user's system when the target user invokes scp against the malicious SSH server.
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