漏洞信息详情
Linux Kernel nfsd CAP_MKNOD绕过安全限制漏洞
漏洞简介
Linux kernel是美国Linux基金会发布的开源操作系统Linux所使用的内核。NFSv4 implementation是其中的一个分布式文件系统协议。
Linux Kernel的nfsd线程在处理来自非root用户请求时没有丢弃CAP_MKNOD权限,这允许非特权客户端在以root_squash选项导出的文件系统上创建设备节点。
这个漏洞的起因是CAP_MKNOD允许用户在本地主机上执行vfs_mknod(...)函数,该函数会调用nfs模块中向NFS服务器发送请求的通讯函数,而nfsd在扮演为该用户的时候不会在nfsd_setuser(...)函数中丢弃CAP_MKNOD。
漏洞公告
目前厂商已经发布了升级补丁以修复这个安全问题,补丁下载链接:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=76a67ec6fb79ff3570dcb5342142c16098299911#patch1
参考网址
来源:SECUNIA
链接:http://secunia.com/advisories/35390
来源:SECUNIA
链接:http://secunia.com/advisories/35394
来源:SUSE
链接:http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00000.html
来源:SECUNIA
链接:http://secunia.com/advisories/37471
来源:CONFIRM
链接:https://www.vmware.com/security/advisories/VMSA-2009-0016.html
来源:SUSE
链接:http://lists.opensuse.org/opensuse-security-announce/2009-04/msg00007.html
来源:SECUNIA
链接:http://secunia.com/advisories/34432
来源:MLIST
链接:http://www.openwall.com/lists/oss-security/2009/03/23/1
来源:REDHAT
链接:http://www.redhat.com/support/errata/RHSA-2009-1081.html
来源:CONFIRM
链接:http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.28.9
来源:DEBIAN
链接:https://www.debian.org/security/2009/dsa-1800
来源:OVAL
链接:https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10314
来源:SUSE
链接:http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00001.html
来源:SUSE
链接:http://lists.opensuse.org/opensuse-security-announce/2009-05/msg00002.html
来源:SECUNIA
链接:http://secunia.com/advisories/35185
来源:XF
链接:https://exchange.xforce.ibmcloud.com/vulnerabilities/49356
来源:BID
链接:https://www.securityfocus.com/bid/34205
来源:SECUNIA
链接:http://secunia.com/advisories/35343
来源:SECUNIA
链接:http://secunia.com/advisories/35121
来源:SECUNIA
链接:http://secunia.com/advisories/34786
来源:SECUNIA
链接:http://secunia.com/advisories/34422
来源:UBUNTU
链接:http://www.ubuntu.com/usn/usn-793-1
来源:OVAL
链接:https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8382
来源:SECUNIA
链接:http://secunia.com/advisories/35656
来源:CONFIRM
链接:http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=76a67ec6fb79ff3570dcb5342142c16098299911
来源:BUGTRAQ
链接:http://www.securityfocus.com/archive/1/507985/100/0/threaded
来源:VUPEN
链接:http://www.vupen.com/english/advisories/2009/0802
来源:MLIST
链接:http://thread.gmane.org/gmane.linux.kernel/805280
来源:VUPEN
链接:http://www.vupen.com/english/advisories/2009/3316
受影响实体
- Linux Linux_kernel:2.6.9<!--2000-1-1-->
- Linux Linux_kernel:2.6.27:Rc6<!--2000-1-1-->
- Linux Linux_kernel:2.6.8<!--2000-1-1-->
- Linux Linux_kernel:2.6.7<!--2000-1-1-->
- Linux Linux_kernel:2.6.6<!--2000-1-1-->
补丁
暂无
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