发布时间 :2003-04-02 00:00:00
修订时间 :2008-09-05 16:30:48

[原文]Directory traversal vulnerability in avatar.php in CoolForum 0.5 beta allows remote attackers to read arbitrary files via .. (dot dot) sequences in the img parameter.


[机译]在avatar.php在CoolForum 0.5测试版中的目录遍历漏洞,远程攻击者可以读取任意文件通过..

- CVSS (基础分值)

CVSS分值: 5 [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: NONE [漏洞利用无需身份认证]

- 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

- 其它链接及资源
(VENDOR_ADVISORY)  XF  coolforum-avatar-view-php(10237)
(VENDOR_ADVISORY)  BUGTRAQ  20021012 CoolForum v 0.5 beta shows content of PHP files
(UNKNOWN)  VULNWATCH  20021001 [VulnWatch] CoolForum v 0.5 beta shows content of PHP files

- 漏洞信息

CoolForum avatar.php Arbitrary File Access
Remote / Network Access Input Manipulation
Loss of Confidentiality
Exploit Public

- 漏洞描述

CoolForum contains a flaw that allows a remote attacker to view files outside of the web path. The issue is due to the avatar.php script not properly sanitizing user input, specifically traversal style attacks (../../) supplied via the img variable.

- 时间线

2002-10-01 2002-09-16
2002-10-01 Unknow

- 解决方案

Upgrade to version 0.5.1 beta or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.

- 相关参考

- 漏洞作者

- 漏洞信息

CoolForum Source Disclosure Vulnerability
Input Validation Error 5973
Yes No
2002-10-15 12:00:00 2009-07-11 06:06:00
Discovery credited to Arnaud Jacques aka scrap.

- 受影响的程序版本

CoolForum CoolForum 0.5 beta
CoolForum CoolForum 0.5.2 beta
CoolForum CoolForum 0.5.1 beta

- 不受影响的程序版本

CoolForum CoolForum 0.5.2 beta
CoolForum CoolForum 0.5.1 beta

- 漏洞讨论

A vulnerability has been discovered in CoolForum v0.5 beta.

It has been reported that by passing maliciously constructed requests to the 'avatar.php' script included with CoolForum, it is possible to access arbitrary PHP files. Requesting files with this method will allow an attacker to bypass .htaccess list restrictions. Other sensitive files may also be disclosed.

It has been reported that web servers failing to implement restricted directories, such as chroot, it is possible for an attacker to access arbitrary webserver readable system files.

By exploiting this issue to access sensitive files, it may be possible for an attacker to obtain information required to launch further attacks against the target server.

- 漏洞利用

This issue can be exploited from a web browser.

- 解决方案

The vendor has addressed the issue in later versions of the software:

CoolForum CoolForum 0.5 beta

- 相关参考