CVE-2010-4346

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

A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.

Affected Software

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