Date: Mon, 4 Aug 2014 19:32:50 +0200 From: Petr Matousek <pmatouse@...hat.com> To: oss-security@...ts.openwall.com Cc: aliguori@...zon.com, mst@...hat.com, Amit Shah <amit.shah@...hat.com>, Laszlo Ersek <lersek@...hat.com> Subject: CVE Request -- qemu: missing field list terminator in vmstate_xhci_event It was found that vmstate_xhci_event field list was missing VMSTATE_END_OF_LIST() terminator and traversing through this list would result in out-of-bounds access during vm state saving and loading. Depending on how vmstate_xhci_event is placed in the qemu binary, this issue can range from non-issue, infinite loop to (potentially) privilege escalation in case the we end up with fields that have info and/or field_exist members initialized in a way that is useful for exploitation (most probably unlikely). In the worst case, attacker able to alter the migration data could use this flaw to to corrupt QEMU process memory. Upstream commit: http://git.qemu.org/?p=qemu.git;a=commit;h=3afca1d6d413592c2b78cf28f52fa24a586d8f56 Reference: https://bugzilla.redhat.com/show_bug.cgi?id=1126543 Thanks, -- Petr Matousek / Red Hat Security Response Team PGP: 0xC44977CA 8107 AF16 A416 F9AF 18F3 D874 3E78 6F42 C449 77CA
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