Date: Tue, 2 Feb 2010 15:56:51 -0500 (EST) From: Josh Bressers <bressers@...hat.com> To: oss-security@...ts.openwall.com Cc: "Steven M. Christey" <coley@...us.mitre.org> Subject: Re: CVE request - kvm: cat /dev/port in the guest can cause host DoS ----- "Eugene Teo" <eugeneteo@...nel.sg> wrote: > The problem is pit_state->channels has 3 elements, and > pit_ioport_read > uses "addr" as index to pit_get_count, so inb(0x43) reads (and > potentially writes) into other data of kvm_kpit_state. > > PIT control word (address 0x43) is write-only, reads are undefined. > > Triggering this can cause a general protection fault on the host. > > https://bugzilla.redhat.com/show_bug.cgi?id=560887 > http://firstname.lastname@example.org/msg28002.html > Please use CVE-2010-0309 for this. Thanks. -- JB
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