Explain CVE-2009-1072
nfsd in the Linux kernel before 2.6.28.9 does not drop the CAP_MKNOD capability before handling a user request in a thread, which allows local users to create device nodes, as demonstrated on a filesystem that has been exported with the root_squash option.
Affected Products: n/a
References: [{'name': '35390', 'tags': ['third-party-advisory', 'x_refsource_SECUNIA'], 'url': 'http://secunia.com/advisories/35390'}, {'name': '34432', 'tags': ['third-party-advisory', 'x_refsource_SECUNIA'], 'url': 'http://secunia.com/advisories/34432'}, {'name': '34422', 'tags': ['third-party-advisory', 'x_refsource_SECUNIA'], 'url': 'http://secunia.com/advisories/34422'}, {'name': 'ADV-2009-0802', 'tags': ['vdb-entry', 'x_refsource_VUPEN'], 'url': 'http://www.vupen.com/english/advisories/2009/0802'}, {'name': '34786', 'tags': ['third-party-advisory', 'x_refsource_SECUNIA'], 'url': 'http://secunia.com/advisories/34786'}, {'name': '[oss-security] 20090323 CVE request: kernel: nfsd did not drop CAP_MKNOD for non-root', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'http://www.openwall.com/lists/oss-security/2009/03/23/1'}, {'name': '34205', 'tags': ['vdb-entry', 'x_refsource_BID'], 'url': 'http://www.securityfocus.com/bid/34205'}, {'name': 'SUSE-SA:2009:028', 'tags': ['vendor-advisory', 'x_refsource_SUSE'], 'url': 'http://lists.opensuse.org/opensuse-security-announce/2009-05/msg00002.html'}, {'name': '37471', 'tags': ['third-party-advisory', 'x_refsource_SECUNIA'], 'url': 'http://secunia.com/advisories/37471'}, {'name': '35656', 'tags': ['third-party-advisory', 'x_refsource_SECUNIA'], 'url': 'http://secunia.com/advisories/35656'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'http://www.vmware.com/security/advisories/VMSA-2009-0016.html'}, {'name': '[linux-kernel] 20090311 VFS, NFS security bug? Should CAP_MKNOD and CAP_LINUX_IMMUTABLE be added to CAP_FS_MASK?', 'tags': ['mailing-list', 'x_refsource_MLIST'], 'url': 'http://thread.gmane.org/gmane.linux.kernel/805280'}, {'name': 'SUSE-SA:2009:030', 'tags': ['vendor-advisory', 'x_refsource_SUSE'], 'url': 'http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00000.html'}, {'name': '35185', 'tags': ['third-party-advisory', 'x_refsource_SECUNIA'], 'url': 'http://secunia.com/advisories/35185'}, {'name': 'oval:org.mitre.oval:def:10314', 'tags': ['vdb-entry', 'signature', 'x_refsource_OVAL'], 'url': 'https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10314'}, {'name': '20091120 VMSA-2009-0016 VMware vCenter and ESX update release and vMA patch release address multiple security issue in third party components', 'tags': ['mailing-list', 'x_refsource_BUGTRAQ'], 'url': 'http://www.securityfocus.com/archive/1/507985/100/0/threaded'}, {'name': 'oval:org.mitre.oval:def:8382', 'tags': ['vdb-entry', 'signature', 'x_refsource_OVAL'], 'url': 'https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8382'}, {'name': 'SUSE-SA:2009:031', 'tags': ['vendor-advisory', 'x_refsource_SUSE'], 'url': 'http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00001.html'}, {'name': 'SUSE-SA:2009:021', 'tags': ['vendor-advisory', 'x_refsource_SUSE'], 'url': 'http://lists.opensuse.org/opensuse-security-announce/2009-04/msg00007.html'}, {'name': 'USN-793-1', 'tags': ['vendor-advisory', 'x_refsource_UBUNTU'], 'url': 'http://www.ubuntu.com/usn/usn-793-1'}, {'name': 'RHSA-2009:1081', 'tags': ['vendor-advisory', 'x_refsource_REDHAT'], 'url': 'http://www.redhat.com/support/errata/RHSA-2009-1081.html'}, {'name': 'DSA-1800', 'tags': ['vendor-advisory', 'x_refsource_DEBIAN'], 'url': 'http://www.debian.org/security/2009/dsa-1800'}, {'name': '35343', 'tags': ['third-party-advisory', 'x_refsource_SECUNIA'], 'url': 'http://secunia.com/advisories/35343'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.28.9'}, {'name': 'linux-kernel-capmknod-security-bypass(49356)', 'tags': ['vdb-entry', 'x_refsource_XF'], 'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/49356'}, {'tags': ['x_refsource_CONFIRM'], 'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=76a67ec6fb79ff3570dcb5342142c16098299911'}, {'name': '35121', 'tags': ['third-party-advisory', 'x_refsource_SECUNIA'], 'url': 'http://secunia.com/advisories/35121'}, {'name': 'ADV-2009-3316', 'tags': ['vdb-entry', 'x_refsource_VUPEN'], 'url': 'http://www.vupen.com/english/advisories/2009/3316'}, {'name': '35394', 'tags': ['third-party-advisory', 'x_refsource_SECUNIA'], 'url': 'http://secunia.com/advisories/35394'}]
CVE State: PUBLISHED