发布时间 :2003-12-31 00:00:00
修订时间 :2008-09-05 16:36:32

[原文]The iBCS2 system call translator for statfs in NetBSD 1.5 through 1.5.3 and FreeBSD 4 up to 4.8-RELEASE-p2 and 5 up to 5.1-RELEASE-p1 allows local users to read portions of kernel memory (memory disclosure) via a large length parameter, which copies additional kernel memory into userland memory.

[CNNVD]NetBSD和FreeBSD statfs iBCS2内存复制漏洞(CNNVD-200312-352)

        NetBSD 1.5到1.5.3版本以及FreeBSD 4到4.8-RELEASE-p2版本和5到5.1-RELEASE-p1版本中statfs的iBCS2系统调用翻译器存在漏洞。本地用户可以借助超大length参数读取核心内存(内存泄露)的部分,该漏洞复制附加核心内存到userland内存。

- CVSS (基础分值)

CVSS分值: 2.1 [轻微(LOW)]
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: 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
(PATCH)  XF  freebsd-ibcs2-kernel-memory(12892)
(PATCH)  OSVDB  2406

- 漏洞信息

NetBSD和FreeBSD statfs iBCS2内存复制漏洞
低危 未知
2003-12-31 00:00:00 2006-01-20 00:00:00
        NetBSD 1.5到1.5.3版本以及FreeBSD 4到4.8-RELEASE-p2版本和5到5.1-RELEASE-p1版本中statfs的iBCS2系统调用翻译器存在漏洞。本地用户可以借助超大length参数读取核心内存(内存泄露)的部分,该漏洞复制附加核心内存到userland内存。

- 公告与补丁


- 漏洞信息

Multiple BSD Kernel iBCS2 Memory Disclosure
Local Access Required Information Disclosure
Loss of Confidentiality

- 漏洞描述

FreeBSD and NetBSD contain a flaw that may lead to an unauthorized information disclosure. The issue is triggered when a malicious user sends an overly long length parameter to the iBCS2 system call translator for statfs(2), which will disclose kernel memory information resulting in a loss of confidentiality.

- 时间线

2003-08-10 Unknow
Unknow Unknow

- 解决方案

Upgrade to FreeBSD version 4.8-STABLE, RELENG_4_8 (4.8-RELEASE-p3), RELENG_4_7 (4.7-RELEASE-p13), or RELENG_5_1 (5.1-RELEASE-p2) security branches or higher, as it has been reported to fix this vulnerability. Also, FreeBSD has released a patch. Upgrade to NetBSD version 1.5.4 or 1.6, as it has been reported to fix this vulnerability. Also, NetBSD has released a patch.

- 相关参考

- 漏洞作者