发布时间 :2000-10-20 00:00:00
修订时间 :2008-09-05 16:21:47

[原文]Buffer overflow in the Linux binary compatibility module in FreeBSD 3.x through 5.x allows local users to gain root privileges via long filenames in the linux shadow file system.

[CNNVD]FreeBSD Linux binary兼容模式权限提升漏洞(CNNVD-200010-033)

        FreeBSD 3.x到5.x版本的Linux binary兼容模式存在缓冲区溢出漏洞。本地用户可以借助linux shadow文件系统的超长文件名获取根权限。

- 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)

cpe:/o:freebsd:freebsd:3.1FreeBSD 3.1
cpe:/o:freebsd:freebsd:3.4FreeBSD 3.4
cpe:/o:freebsd:freebsd:3.2FreeBSD 3.2
cpe:/o:freebsd:freebsd:3.0FreeBSD 3.0
cpe:/o:freebsd:freebsd:5.0FreeBSD 5.0
cpe:/o:freebsd:freebsd:3.5FreeBSD 3.5
cpe:/o:freebsd:freebsd:3.3FreeBSD 3.3
cpe:/o:freebsd:freebsd:4.0FreeBSD 4.0
cpe:/o:freebsd:freebsd:4.1FreeBSD 4.1

- 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)  XF  freebsd-linux-module-bo(5968)

- 漏洞信息

FreeBSD Linux binary兼容模式权限提升漏洞
高危 缓冲区溢出
2000-10-20 00:00:00 2005-05-02 00:00:00
        FreeBSD 3.x到5.x版本的Linux binary兼容模式存在缓冲区溢出漏洞。本地用户可以借助linux shadow文件系统的超长文件名获取根权限。

- 公告与补丁


- 漏洞信息

FreeBSD Linux Compatibility Mode Buffer Overflow
Local Access Required Input Manipulation
Loss of Integrity

- 漏洞描述

A local overflow exists in FreeBSD. The linux compatibility module fails to valid input resulting in a buffer overflow. With a specially crafted request, an attacker can cause cause values on the stack to be overwritten to gain root privileges resulting in a loss of integrity.

- 时间线

2000-08-28 Unknow
Unknow 2000-07-23

- 解决方案

Upgrade to version 3.5-STABLE, 4.1-STABLE or 5.0-CURRENT after the respective correction dates, as it has been reported to fix this vulnerability. It is also possible to correct the flaw by implementing the following workaround(s): unload the "linux" module by executing the following command as root: #kldunload linux For safety, remove the /modules/linux.ko file to prevent it being reloaded accidentally, and add or change the following line in /etc/rc.conf: linux_enable="NO" # Linux binary compatibility loaded at startup (or NO). If the module is not loaded, to determine whether the functionality has been statically compiled into the kernel, check the kernel configuration file for the following line: options COMPAT_LINUX If present, remove and recompile the kernel as described in and reboot the system.

- 相关参考

- 漏洞作者