The gfs2_dirent_find_space function in fs/gfs2/dir.c in the Linux kernel before 2.6.35 uses an incorrect size value in calculations associated with sentinel directory entries, which allows local users to cause a denial of service (NULL pointer dereference and panic) and possibly have unspecified other impact by renaming a file in a GFS2 filesystem, related to the gfs2_rename function in fs/gfs2/ops_inode.c.
Weakness
The product dereferences a pointer that it expects to be valid but is NULL.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Linux_kernel | Linux | * | 2.6.35 (excluding) |
| Red Hat Enterprise Linux 5 | RedHat | kernel-0:2.6.18-194.17.1.el5 | * |
| Red Hat Enterprise Linux 5.3.Z - Server Only | RedHat | kernel-0:2.6.18-128.23.1.el5 | * |
| Red Hat Enterprise Linux 5.4.Z - Server Only | RedHat | kernel-0:2.6.18-164.25.1.el5 | * |
| Linux | Ubuntu | hardy | * |
| Linux | Ubuntu | jaunty | * |
| Linux | Ubuntu | karmic | * |
| Linux | Ubuntu | upstream | * |
| Linux-ec2 | Ubuntu | karmic | * |
| Linux-ec2 | Ubuntu | lucid | * |
| Linux-ec2 | Ubuntu | maverick | * |
| Linux-fsl-imx51 | Ubuntu | karmic | * |
| Linux-fsl-imx51 | Ubuntu | lucid | * |
| Linux-lts-backport-maverick | Ubuntu | lucid | * |
Potential Mitigations
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=728a756b8fcd22d80e2dbba8117a8a3aafd3f203
- http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00004.html
- http://lists.opensuse.org/opensuse-security-announce/2010-11/msg00000.html
- http://secunia.com/advisories/46397
- http://securitytracker.com/id?1024386
- http://support.avaya.com/css/P8/documents/100113326
- http://www.debian.org/security/2010/dsa-2094
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.35
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:198
- http://www.openwall.com/lists/oss-security/2010/08/02/1
- http://www.openwall.com/lists/oss-security/2010/08/02/10
- http://www.redhat.com/support/errata/RHSA-2010-0660.html
- http://www.redhat.com/support/errata/RHSA-2010-0670.html
- http://www.redhat.com/support/errata/RHSA-2010-0723.html
- http://www.securityfocus.com/archive/1/520102/100/0/threaded
- http://www.securityfocus.com/bid/42124
- http://www.ubuntu.com/usn/USN-1000-1
- http://www.vmware.com/security/advisories/VMSA-2011-0012.html
- https://bugzilla.redhat.com/show_bug.cgi?id=620300
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=728a756b8fcd22d80e2dbba8117a8a3aafd3f203
- http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00004.html
- http://lists.opensuse.org/opensuse-security-announce/2010-11/msg00000.html
- http://secunia.com/advisories/46397
- http://securitytracker.com/id?1024386
- http://support.avaya.com/css/P8/documents/100113326
- http://www.debian.org/security/2010/dsa-2094
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.35
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:198
- http://www.openwall.com/lists/oss-security/2010/08/02/1
- http://www.openwall.com/lists/oss-security/2010/08/02/10
- http://www.redhat.com/support/errata/RHSA-2010-0660.html
- http://www.redhat.com/support/errata/RHSA-2010-0670.html
- http://www.redhat.com/support/errata/RHSA-2010-0723.html
- http://www.securityfocus.com/archive/1/520102/100/0/threaded
- http://www.securityfocus.com/bid/42124
- http://www.ubuntu.com/usn/USN-1000-1
- http://www.vmware.com/security/advisories/VMSA-2011-0012.html
- https://bugzilla.redhat.com/show_bug.cgi?id=620300