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 Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Linux_kernel | Linux | * | 2.6.28.9 (excluding) |
| MRG for RHEL-5 | RedHat | kernel-rt-0:2.6.24.7-117.el5rt | * |
| Red Hat Enterprise Linux 4 | RedHat | kernel-0:2.6.9-89.0.3.EL | * |
| Red Hat Enterprise Linux 5 | RedHat | kernel-0:2.6.18-128.1.14.el5 | * |
| Linux | Ubuntu | hardy | * |
| Linux | Ubuntu | intrepid | * |
| Linux | Ubuntu | jaunty | * |
| Linux-source-2.6.15 | Ubuntu | dapper | * |
| Linux-source-2.6.22 | Ubuntu | gutsy | * |
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=76a67ec6fb79ff3570dcb5342142c16098299911
- http://lists.opensuse.org/opensuse-security-announce/2009-04/msg00007.html
- http://lists.opensuse.org/opensuse-security-announce/2009-05/msg00002.html
- http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00000.html
- http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00001.html
- http://secunia.com/advisories/34422
- http://secunia.com/advisories/34432
- http://secunia.com/advisories/34786
- http://secunia.com/advisories/35121
- http://secunia.com/advisories/35185
- http://secunia.com/advisories/35343
- http://secunia.com/advisories/35390
- http://secunia.com/advisories/35394
- http://secunia.com/advisories/35656
- http://secunia.com/advisories/37471
- http://thread.gmane.org/gmane.linux.kernel/805280
- http://www.debian.org/security/2009/dsa-1800
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.28.9
- http://www.openwall.com/lists/oss-security/2009/03/23/1
- http://www.redhat.com/support/errata/RHSA-2009-1081.html
- http://www.securityfocus.com/archive/1/507985/100/0/threaded
- http://www.securityfocus.com/bid/34205
- http://www.ubuntu.com/usn/usn-793-1
- http://www.vmware.com/security/advisories/VMSA-2009-0016.html
- http://www.vupen.com/english/advisories/2009/0802
- http://www.vupen.com/english/advisories/2009/3316
- https://exchange.xforce.ibmcloud.com/vulnerabilities/49356
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10314
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8382
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commitdiff%3Bh=76a67ec6fb79ff3570dcb5342142c16098299911
- http://lists.opensuse.org/opensuse-security-announce/2009-04/msg00007.html
- http://lists.opensuse.org/opensuse-security-announce/2009-05/msg00002.html
- http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00000.html
- http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00001.html
- http://secunia.com/advisories/34422
- http://secunia.com/advisories/34432
- http://secunia.com/advisories/34786
- http://secunia.com/advisories/35121
- http://secunia.com/advisories/35185
- http://secunia.com/advisories/35343
- http://secunia.com/advisories/35390
- http://secunia.com/advisories/35394
- http://secunia.com/advisories/35656
- http://secunia.com/advisories/37471
- http://thread.gmane.org/gmane.linux.kernel/805280
- http://www.debian.org/security/2009/dsa-1800
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.28.9
- http://www.openwall.com/lists/oss-security/2009/03/23/1
- http://www.redhat.com/support/errata/RHSA-2009-1081.html
- http://www.securityfocus.com/archive/1/507985/100/0/threaded
- http://www.securityfocus.com/bid/34205
- http://www.ubuntu.com/usn/usn-793-1
- http://www.vmware.com/security/advisories/VMSA-2009-0016.html
- http://www.vupen.com/english/advisories/2009/0802
- http://www.vupen.com/english/advisories/2009/3316
- https://exchange.xforce.ibmcloud.com/vulnerabilities/49356
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10314
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8382