Integer overflow in the VGA module in QEMU allows local guest OS users to cause a denial of service (out-of-bounds read and QEMU process crash) by editing VGA registers in VBE mode.
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
| Link | Tags |
|---|---|
| http://xenbits.xen.org/xsa/advisory-179.html | third party advisory |
| http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html | third party advisory |
| http://rhn.redhat.com/errata/RHSA-2017-0621.html | third party advisory vendor advisory |
| http://support.citrix.com/article/CTX212736 | third party advisory |
| https://lists.gnu.org/archive/html/qemu-devel/2016-05/msg01196.html | patch mailing list third party advisory |
| http://www.openwall.com/lists/oss-security/2016/05/09/4 | third party advisory mailing list |
| http://www.securitytracker.com/id/1035794 | third party advisory vdb entry |
| http://www.ubuntu.com/usn/USN-2974-1 | third party advisory vendor advisory |
| http://rhn.redhat.com/errata/RHSA-2016-2585.html | third party advisory vendor advisory |
| http://www.debian.org/security/2016/dsa-3573 | third party advisory vendor advisory |
| http://www.securityfocus.com/bid/90314 | third party advisory vdb entry |