CVE-2012-1097

The regset (aka register set) feature in the Linux kernel before 3.2.10 does not properly handle the absence of .get and .set methods, which allows local users to cause a denial of service (NULL pointer dereference) or possibly have unspecified other impact via a (1) PTRACE_GETREGSET or (2) PTRACE_SETREGSET ptrace call.

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=c8e252586f8d5de906385d8cf6385fee289a825e
• http://lists.opensuse.org/opensuse-security-announce/2012-04/msg00021.html
• http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00013.html
• http://rhn.redhat.com/errata/RHSA-2012-0481.html
• http://rhn.redhat.com/errata/RHSA-2012-0531.html
• http://secunia.com/advisories/48842
• http://secunia.com/advisories/48898
• http://secunia.com/advisories/48964
• http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.2.10
• http://www.openwall.com/lists/oss-security/2012/03/05/1
• https://bugzilla.redhat.com/show_bug.cgi?id=799209
• https://github.com/torvalds/linux/commit/c8e252586f8d5de906385d8cf6385fee289a825e