OVMSA-2016-0172 - xen security update
| Type: | SECURITY |
| Impact: | IMPORTANT |
| Release Date: | 2016-12-07 |
Description
[4.1.3-25.el5.223.45]
- qemu: ioport_read, ioport_write: be defensive about 32-bit addresses
On x86, ioport addresses are 16-bit. That these functions take 32-bit
arguments is a mistake. Changing the argument type to 16-bit will
discard the top bits of any erroneous values from elsewhere in qemu.
Also, check just before use that the value is in range. (This turns
an ill-advised change to MAX_IOPORTS into a possible guest crash
rather than a privilege escalation vulnerability.)
And, in the Xen ioreq processor, clamp incoming ioport addresses to
16-bit values. Xen will never write >16-bit values but the guest may
have access to the ioreq ring. We want to defend the rest of the qemu
code from wrong values.
This is XSA-199.
Signed-off-by: Ian Jackson
Backported-by: Zhenzhong Duan
Reviewed-by: Boris Ostrovsky [bug 25149333] {CVE-2016-9637}
Related CVEs
Updated Packages
| Release/Architecture | Filename | sha256 | Superseded By Advisory | Channel Label |
|
| Oracle VM 3.2 (x86_64) | xen-4.1.3-25.el5.223.45.src.rpm | 812bdff8e9b8975fbe4066387576bde70dc3a227f5200cc4ab645480a7a88998 | OVMBA-2024-0012 | ovm3_3.2.1_x86_64_patch |
| xen-4.1.3-25.el5.223.45.x86_64.rpm | 5250f28d9309e97a735f048e196b5b89774165a6027c0e796d33a82af20dc22e | OVMBA-2024-0012 | ovm3_3.2.1_x86_64_patch |
| xen-devel-4.1.3-25.el5.223.45.x86_64.rpm | 66624a12de5200ea5ed0ca8a909bb22ca609cd0f3c2851020cefe1b56b56635a | OVMSA-2019-0048 | ovm3_3.2.1_x86_64_patch |
| xen-tools-4.1.3-25.el5.223.45.x86_64.rpm | 494d3f1ea3dee2b6dbd38ca7c65318400728705b69690a0ca8513f9f269c049d | OVMBA-2024-0012 | ovm3_3.2.1_x86_64_patch |
This page is generated automatically and has not been checked for errors or omissions. For clarification
or corrections please contact the Oracle Linux ULN team
