Xlight FTP Server SFTP directory traversal

xlight-sftp-directory-traversal (60151)

Medium Risk

Description:

Xlight FTP Server could allow a remote attacker to traverse directories on the system. An attacker could send a specially-crafted GET request to the SFTP/SSH2 virtual server containing "dot dot" sequences (/../) to read arbitrary files on the system.

*CVSS:

Base Score:	5
Access Vector:	Network
Access Complexity:	Low
Authentication:	None
Confidentiality Impact:	Partial
Integrity Impact:	None
Availability Impact:	None
Temporal Score:	4.4
Exploitability:	High
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Gain Access

Remedy:

Upgrade to the latest version of Xlight FTP Server (3.6.0 or later), available from the Xlight FTP Server Web site. See References.

References:

• BugTraq Mailing List, Mon Jul 05 2010: Xlight FTPd Multiple Directory Traversal in SFTP.
• Xlight FTP Server Web site: Xlight FTP Server - what is new, 3.2.1, Fix a SQL injection vulnerability for ODBC authentication..
• BID-41399: Xlight FTP Server Multiple Directory Traversal Vulnerabilities
• CVE-2010-2695: Directory traversal vulnerability in the SFTP/SSH2 virtual server in Xlight FTP Server 3.5.0, 3.5.5, and possibly other versions before 3.6 allows remote authenticated users to read, overwrite, or delete arbitrary files via .. (dot dot) sequences in the (1) ls, (2) rm, (3) rename, and other unspecified commands.
• OSVDB ID: 66037: Xlight FTP Server SFTP/SSH2 Virtual Server Traversal Arbitrary File Access
• SA40473: Xlight FTP Server SFTP Directory Traversal Vulnerability

Platforms Affected:

• Xlight FTP server Xlight FTP server 3.5.0
• Xlight FTP server Xlight FTP server 3.5.5
• Xlightftpd Xlight FTP Server 3.5
• Xlightftpd Xlight FTP Server 3.5.5

Reported:

Jun 05, 2010

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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