The install_special_mapping function in mm/mmap.c in the Linux kernel before 2.6.37-rc6 does not make an expected security_file_mmap function call, which allows local users to bypass intended mmap_min_addr restrictions and possibly conduct NULL pointer dereference attacks via a crafted assembly-language application.
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 | * | 2.6.37 (excluding) |
| Linux_kernel | Linux | 2.6.37 (including) | 2.6.37 (including) |
| Linux_kernel | Linux | 2.6.37-rc1 (including) | 2.6.37-rc1 (including) |
| Linux_kernel | Linux | 2.6.37-rc2 (including) | 2.6.37-rc2 (including) |
| Linux_kernel | Linux | 2.6.37-rc3 (including) | 2.6.37-rc3 (including) |
| Linux_kernel | Linux | 2.6.37-rc4 (including) | 2.6.37-rc4 (including) |
| Linux_kernel | Linux | 2.6.37-rc5 (including) | 2.6.37-rc5 (including) |
| MRG for RHEL-5 | RedHat | kernel-rt-0:2.6.33.7-rt29.55.el5rt | * |
| Red Hat Enterprise Linux 5 | RedHat | kernel-0:2.6.18-238.9.1.el5 | * |
| Red Hat Enterprise Linux 6 | RedHat | kernel-0:2.6.32-71.24.1.el6 | * |
| Linux | Ubuntu | hardy | * |
| Linux | Ubuntu | karmic | * |
| Linux | Ubuntu | lucid | * |
| Linux | Ubuntu | maverick | * |
| Linux | Ubuntu | natty | * |
| Linux | Ubuntu | upstream | * |
| Linux-ec2 | Ubuntu | karmic | * |
| Linux-ec2 | Ubuntu | lucid | * |
| Linux-ec2 | Ubuntu | maverick | * |
| Linux-ec2 | Ubuntu | upstream | * |
| Linux-fsl-imx51 | Ubuntu | karmic | * |
| Linux-fsl-imx51 | Ubuntu | lucid | * |
| Linux-fsl-imx51 | Ubuntu | upstream | * |
| Linux-lts-backport-maverick | Ubuntu | lucid | * |
| Linux-lts-backport-maverick | Ubuntu | upstream | * |
| Linux-lts-backport-natty | Ubuntu | upstream | * |
| Linux-mvl-dove | Ubuntu | karmic | * |
| Linux-mvl-dove | Ubuntu | lucid | * |
| Linux-mvl-dove | Ubuntu | maverick | * |
| Linux-mvl-dove | Ubuntu | upstream | * |
| Linux-source-2.6.15 | Ubuntu | upstream | * |
| Linux-ti-omap4 | Ubuntu | maverick | * |
| Linux-ti-omap4 | Ubuntu | upstream | * |
Potential Mitigations
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=462e635e5b73ba9a4c03913b77138cd57ce4b050
- http://openwall.com/lists/oss-security/2010/12/09/12
- http://openwall.com/lists/oss-security/2010/12/09/13
- http://openwall.com/lists/oss-security/2010/12/10/2
- http://openwall.com/lists/oss-security/2010/12/10/3
- http://secunia.com/advisories/42570
- http://secunia.com/advisories/46397
- http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.37-rc6
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:029
- http://www.securityfocus.com/archive/1/520102/100/0/threaded
- http://www.securityfocus.com/bid/45323
- http://www.vmware.com/security/advisories/VMSA-2011-0012.html
- https://bugzilla.redhat.com/show_bug.cgi?id=662189
- https://lkml.org/lkml/2010/12/9/222
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=462e635e5b73ba9a4c03913b77138cd57ce4b050
- http://openwall.com/lists/oss-security/2010/12/09/12
- http://openwall.com/lists/oss-security/2010/12/09/13
- http://openwall.com/lists/oss-security/2010/12/10/2
- http://openwall.com/lists/oss-security/2010/12/10/3
- http://secunia.com/advisories/42570
- http://secunia.com/advisories/46397
- http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.37-rc6
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:029
- http://www.securityfocus.com/archive/1/520102/100/0/threaded
- http://www.securityfocus.com/bid/45323
- http://www.vmware.com/security/advisories/VMSA-2011-0012.html
- https://bugzilla.redhat.com/show_bug.cgi?id=662189
- https://lkml.org/lkml/2010/12/9/222