CVE-2016-1886

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."

CVSS v3 7.8 HIGH
CVSS v2.0 7.2 HIGH

7.8^/10

CVSS v3 : HIGH

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

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.2^/10

CVSS v2.0 : HIGH

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

Exploitability : 3.9 / Impact : 10.0

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
http://cturt.github.io/SETFKEY.html	Exploit
http://www.securityfocus.com/bid/90734
http://www.securitytracker.com/id/1035905
https://security.FreeBSD.org/patches/SA-16:18/atkbd.patch	Patch
https://www.freebsd.org/security/advisories/FreeBSD-SA-16:18.atkbd.asc	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:freebsd:freebsd:9.3:::::::*
	cpe:2.3:o:freebsd:freebsd:10.1:::::::*
	cpe:2.3:o:freebsd:freebsd:10.2:::::::*
	cpe:2.3:o:freebsd:freebsd:10.3:::::::*

History

No history.

Information

Published : 2016-05-25 15:59

Updated : 2017-04-20 01:59

NVD link : CVE-2016-1886

Mitre link : CVE-2016-1886

CVE.ORG link : CVE-2016-1886

JSON object : View

Products Affected

freebsd

freebsd

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

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