CVE-2016-7908

LOW

Description

The mcf_fec_do_tx function in hw/net/mcf_fec.c in QEMU (aka Quick Emulator) does not properly limit the buffer descriptor count when transmitting packets, which allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via vectors involving a buffer descriptor with a length of 0 and crafted values in bd.flags.

References

http://git.qemu.org/?p=qemu.git;a=commit;h=070c4b92b8cd5390889716677a0b92444d6e087a

http://lists.opensuse.org/opensuse-updates/2016-12/msg00140.html

http://www.openwall.com/lists/oss-security/2016/10/03/2

http://www.openwall.com/lists/oss-security/2016/10/03/5

http://www.securityfocus.com/bid/93273

https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html

https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg05557.html

https://security.gentoo.org/glsa/201611-11

Details

Source: MITRE

Published: 2016-10-05

Updated: 2018-12-01

Type: CWE-399

Risk Information

CVSS v2.0

Base Score: 2.1

Vector: AV:L/AC:L/Au:N/C:N/I:N/A:P

Impact Score: 2.9

Exploitability Score: 3.9

Severity: LOW

CVSS v3.0

Base Score: 4.4

Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Impact Score: 3.6

Exploitability Score: 0.8

Severity: MEDIUM