The (1) fw_cfg_write and (2) fw_cfg_read functions in hw/nvram/fw_cfg.c in QEMU before 2.4, when built with the Firmware Configuration device emulation support, allow guest OS users with the CAP_SYS_RAWIO privilege to cause a denial of service (out-of-bounds read or write access and process crash) or possibly execute arbitrary code via an invalid current entry value in a firmware configuration.
http://www.openwall.com/lists/oss-security/2016/01/11/7
http://www.openwall.com/lists/oss-security/2016/01/12/10
http://www.openwall.com/lists/oss-security/2016/01/12/11
http://www.securityfocus.com/bid/80250
http://www.securitytracker.com/id/1034858
https://lists.gnu.org/archive/html/qemu-devel/2016-01/msg00428.html
http://rhn.redhat.com/errata/RHSA-2016-0088.html
http://rhn.redhat.com/errata/RHSA-2016-0085.html
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
http://rhn.redhat.com/errata/RHSA-2016-0082.html
http://rhn.redhat.com/errata/RHSA-2016-0083.html
http://rhn.redhat.com/errata/RHSA-2016-0081.html
http://rhn.redhat.com/errata/RHSA-2016-0084.html
http://rhn.redhat.com/errata/RHSA-2016-0086.html
http://rhn.redhat.com/errata/RHSA-2016-0087.html
https://security.gentoo.org/glsa/201604-01
http://www.debian.org/security/2016/dsa-3471
Source: MITRE
Published: 2016-04-07
Updated: 2023-02-12
Type: CWE-119
Base Score: 6.9
Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C
Impact Score: 10
Exploitability Score: 3.4
Severity: MEDIUM
Base Score: 8.1
Vector: CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Impact Score: 6
Exploitability Score: 1.4
Severity: HIGH