发布时间 :2004-12-31 00:00:00
修订时间 :2008-09-05 16:44:16

[原文]Directory traversal vulnerability in Nexgen FTP Server before allows remote authenticated users to read or list arbitrary files via (1) "..", (2) "\..\" (backslash dot dot), or (3) "/../" sequences in (a) RETR (get), (b) NLST (ls), (c) LIST (ls), (d) RNFR, or (e) RNTO FTP commands.

[CNNVD]NexGen FTP Server远程目录遍历漏洞(CNNVD-200412-1191)

        Nexgen FTP Server是一款多功能的FTP服务程序。
        Nexgen FTP Server包含的多个FTP命令对参数缺少充分过滤,远程攻击者可以利用这个漏洞以FTP权限查看任意文件内容。
        部分如'ls', 'dir', 'get'命令对参数缺少正确检查,攻击者可以对服务器进行目录遍历攻击,以FTP权限查看任意文件内容。

- CVSS (基础分值)

CVSS分值: 4 [中等(MEDIUM)]
机密性影响: PARTIAL [很可能造成信息泄露]
完整性影响: NONE [不会对系统完整性产生影响]
可用性影响: NONE [对系统可用性无影响]
攻击复杂度: LOW [漏洞利用没有访问限制 ]
攻击向量: [--]
身份认证: [--]

- CPE (受影响的平台与产品)


- OVAL (用于检测的技术细节)


- 官方数据库链接
(官方数据源) MITRE
(官方数据源) NVD
(官方数据源) CNNVD

- 其它链接及资源
(PATCH)  BID  9970
(UNKNOWN)  XF  nexgen-dotdot-directory-traversal(15594)

- 漏洞信息

NexGen FTP Server远程目录遍历漏洞
中危 输入验证
2004-12-31 00:00:00 2006-01-25 00:00:00
        Nexgen FTP Server是一款多功能的FTP服务程序。
        Nexgen FTP Server包含的多个FTP命令对参数缺少充分过滤,远程攻击者可以利用这个漏洞以FTP权限查看任意文件内容。
        部分如'ls', 'dir', 'get'命令对参数缺少正确检查,攻击者可以对服务器进行目录遍历攻击,以FTP权限查看任意文件内容。

- 公告与补丁


- 漏洞信息 (23877)

NexGen FTP Server 1.0/2.x Remote Directory Traversal Vulnerability (EDBID:23877)
windows remote
2004-03-24 Verified
0 Ziv Kamir
N/A [点击下载]

It has been reported that the Nexgen FTP server is prone to a remote directory traversal vulnerability. This issue is due to a failure of the application to properly sanitize file request strings from authenticated users.

Successful exploitation of this vulnerability may allow a remote attacker to gain access to sensitive information that may be used to launch further attacks against a vulnerable system.

ls c:\*.*
ls ..
ls \ /../
dir c:dir \..\*.*
get c:\"Exist File" [ c:\boot.ini ]
get \..\"Exist File"		

- 漏洞信息

Nexgen FTP Server Multiple Commands Traversal Arbitrary File Access
Remote / Network Access Input Manipulation
Loss of Confidentiality
Exploit Public Vendor Verified

- 漏洞描述

Nexgen FTP Server contains a flaw that allows a remote attacker to view directories and files outside of the web path. The issue is due to the program not properly sanitizing user input, specifically traversal style attacks (../../) supplied via NLST (ls), LIST (dir), RETR (get), RNFR and RNTO ftp commands.

- 时间线

2004-03-24 Unknow
2004-03-24 Unknow

- 解决方案

Upgrade to version 2.2 or higher after the correction date, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds. Be advised that the vendor has fixed this issue without advancing the version number.

- 相关参考

- 漏洞作者