发布时间 :2000-02-24 00:00:00
修订时间 :2008-09-10 15:03:16

[原文]buildxconf in Corel Linux allows local users to modify or create arbitrary files via the -x or -f parameters.

[CNNVD]Corel Linux buildxconfig漏洞(CNNVD-200002-067)

        Corel Linux buildxconf存在漏洞。本地用户借助-x 或 -f参数可以修改或修改任意文件。

- CVSS (基础分值)

CVSS分值: 7.2 [严重(HIGH)]
机密性影响: COMPLETE [完全的信息泄露导致所有系统文件暴露]
完整性影响: COMPLETE [系统完整性可被完全破坏]
可用性影响: COMPLETE [可能导致系统完全宕机]
攻击复杂度: LOW [漏洞利用没有访问限制 ]
攻击向量: LOCAL [漏洞利用需要具有物理访问权限或本地帐户]
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
(官方数据源) CNNVD

- 其它链接及资源
(UNKNOWN)  BID  1007
(UNKNOWN)  BUGTRAQ  20000224 Corel Linux 1.0 local root compromise

- 漏洞信息

Corel Linux buildxconfig漏洞
高危 输入验证
2000-02-24 00:00:00 2005-05-02 00:00:00
        Corel Linux buildxconf存在漏洞。本地用户借助-x 或 -f参数可以修改或修改任意文件。

- 公告与补丁

        Currently the SecurityFocus staff are not aware of any vendor supplied patches for this issue. If you feel we are in error or are aware of more recent information, please mail us at:
        Removal of the setuid bit from this binary will remove the problem:
         chmod -s /sbin/buildxconfig

- 漏洞信息 (19764)

Corel Linux OS 1.0 buildxconfig Vulnerabilities (EDBID:19764)
linux local
2000-02-24 Verified
0 suid
N/A [点击下载]

Several vulnerabilities exist in the buildxconfig program, as included with Corel Linux 1.0. Using this program, it is likely that a local user could elevate privileges.

By failing to check input to the -f and -x flags, it is possible for an attacker to append to existing files, or create files that previously didn't exist. Using the -f argument, and supplying a filename that does exist, it is possible to append information to a file. Using the -x argument, and a file that does exist, it is possible toreplace the first line of any file with the path to the X server selected. Finally, if either flag is passed the name of a file that does not exist, it will create it, with read, write and execute permission available for all users on the system.

Method 1: buildxconfig -f /etc/shadow 

Method 2: buildxconfig -x /etc/passwd

Method 3: 
umask 0 
buildxconfig -x /.rhosts 
echo "+ +" > /.rhosts		

- 漏洞信息

buildxconf on Corel Linux Multiple Parameter Arbitrary Privileged File Creation
Local Access Required Input Manipulation
Loss of Integrity Solution Unknown
Exploit Public Third-party Verified

- 漏洞描述

- 时间线

2000-02-24 Unknow
Unknow Unknow

- 解决方案

OSVDB is not aware of a solution for this vulnerability.

- 相关参考

- 漏洞作者

Unknown or Incomplete