CVE-2016-1886

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CVE-2016-1886

Summary:

Details: Integer signedness error in the genkbd_commonioctl function in sys/dev/kbd/kbd.c in FreeBSD 9.3 before p42, 10.1 before p34, 10.2 before p17, and 10.3 before p3 allows local users to obtain sensitive information from kernel memory, cause a denial of service (memory overwrite and kernel crash), or gain privileges via a negative value in the flen structure member in the arg argument in a SETFKEY ioctl call, which triggers a "two way heap and stack overflow."

References: https://www.freebsd.org/security/advisories/FreeBSD-SA-16:18.atkbd.asc, http://cturt.github.io/SETFKEY.html, https://security.FreeBSD.org/patches/SA-16:18/atkbd.patch, http://www.securityfocus.com/bid/90734, http://www.securitytracker.com/id/1035905