The ioapic_read_indirect function in virt/kvm/ioapic.c in the Linux kernel through 3.8.4 does not properly handle a certain combination of invalid IOAPIC_REG_SELECT and IOAPIC_REG_WINDOW operations, which allows guest OS users to obtain sensitive information from host OS memory or cause a denial of service (host OS OOPS) via a crafted application.

References

• https://nvd.nist.gov/vuln/detail/CVE-2013-1798
• torvalds/linux@a2c118b
• https://bugzilla.redhat.com/show_bug.cgi?id=917017
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a2c118bfab8bc6b8bb213abfc35201e441693d55
• http://lists.opensuse.org/opensuse-security-announce/2013-05/msg00018.html
• http://lists.opensuse.org/opensuse-security-announce/2013-06/msg00005.html
• http://lists.opensuse.org/opensuse-security-announce/2013-07/msg00018.html
• http://packetstormsecurity.com/files/157233/Kernel-Live-Patch-Security-Notice-LSN-0065-1.html
• http://rhn.redhat.com/errata/RHSA-2013-0727.html
• http://rhn.redhat.com/errata/RHSA-2013-0744.html
• http://rhn.redhat.com/errata/RHSA-2013-0746.html
• http://rhn.redhat.com/errata/RHSA-2013-0928.html
• http://rhn.redhat.com/errata/RHSA-2013-1026.html
• http://www.mandriva.com/security/advisories?name=MDVSA-2013:176
• http://www.openwall.com/lists/oss-security/2013/03/20/9
• http://www.ubuntu.com/usn/USN-1809-1
• http://www.ubuntu.com/usn/USN-1812-1
• http://www.ubuntu.com/usn/USN-1813-1
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a2c118bfab8bc6b8bb213abfc35201e441693d55