发布时间 :2001-02-12 00:00:00
修订时间 :2008-09-05 16:23:10

[原文]procfs in FreeBSD and possibly other operating systems allows local users to bypass access control restrictions for a jail environment and gain additional privileges.

[CNNVD]FreeBSD procfs权限许可和访问控制漏洞(CNNVD-200102-010)


- 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:4.2FreeBSD 4.2
cpe:/o:freebsd:freebsd:4.1.1FreeBSD 4.1.1
cpe:/o:freebsd:freebsd:3.5.1FreeBSD 3.5.1
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  procfs-access-control-bo(6108)

- 漏洞信息

FreeBSD procfs权限许可和访问控制漏洞
高危 未知
2001-02-12 00:00:00 2005-07-26 00:00:00

- 公告与补丁


- 漏洞信息

FreeBSD procfs jail() Access Restriction Bypass Local Privilege Escalation
Local Access Required Input Manipulation
Loss of Confidentiality, Loss of Integrity
Exploit Unknown

- 漏洞描述

FreeBSD contains a flaw that may allow a users to break out of jail virtual machines. The issue is due to an unchecked buffer in the kernel that can be exploited by jailed users. By overflowing this buffer with specially crafted code, a jailed user could bypass any restrictions normally enforced by the jailed environment and execute arbitrary code or commands, including lowering the system security level.

- 时间线

2000-12-18 Unknow
Unknow Unknow

- 解决方案

Upgrade to version 3.5.1-STABLE, 4.2-STABLE or higher, as it has been reported to fix this vulnerability. It is also possible to correct the flaw by implementing the following workarounds: 1. Unmount all procfs filesystems which are visible from within jail environments 2. Remove the "options PROCFS" line from your kernel configuration file and compile a new kernel.

- 相关参考

- 漏洞作者