Integer overflow in the net_tx_pkt_init function in hw/net/net_tx_pkt.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (QEMU process crash) via the maximum fragmentation count, which triggers an unchecked multiplication and NULL pointer dereference.
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://www.securityfocus.com/bid/92556 | third party advisory vdb entry |
| http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=47882fa4975bf0b58dd74474329fdd7154e8f04c | |
| http://www.openwall.com/lists/oss-security/2016/08/19/6 | third party advisory mailing list |
| https://access.redhat.com/errata/RHSA-2017:2392 | third party advisory vendor advisory |
| https://security.gentoo.org/glsa/201609-01 | third party advisory vendor advisory |
| https://lists.gnu.org/archive/html/qemu-devel/2016-08/msg03176.html | patch mailing list third party advisory |
| http://www.openwall.com/lists/oss-security/2016/08/19/10 | third party advisory mailing list |
| https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html | third party advisory mailing list |
| https://access.redhat.com/errata/RHSA-2017:2408 | third party advisory vendor advisory |