CVE-2016-6559

Improper bounds checking of the obuf variable in the link_ntoa() function in linkaddr.c of the BSD libc library may allow an attacker to read or write from memory. The full impact and severity depends on the method of exploit and how the library is used by applications. According to analysis by FreeBSD developers, it is very unlikely that applications exist that utilize link_ntoa() in an exploitable manner, and the CERT/CC is not aware of any proof of concept. A blog post describes the functionality of link_ntoa() and points out that none of the base utilities use this function in an exploitable manner. For more information, please see FreeBSD Security Advisory SA-16:37.

CVSS v3.0 9.8 CRITICAL
CVSS v2.0 7.5 HIGH

9.8^/10

CVSS v3.0 : CRITICAL

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

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.5^/10

CVSS v2.0 : HIGH

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

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://www.securityfocus.com/bid/94694	Third Party Advisory VDB Entry
https://www.kb.cert.org/vuls/id/548487	Third Party Advisory US Government Resource
https://www.freebsd.org/security/advisories/FreeBSD-SA-16:37.libc.asc	Vendor Advisory
http://www.securitytracker.com/id/1037398	Third Party Advisory VDB Entry

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Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:freebsd:freebsd:10.1:::::::*
	cpe:2.3:o:freebsd:freebsd:10.3:::::::*
	cpe:2.3:o:freebsd:freebsd:11.0:::::::*
	cpe:2.3:o:freebsd:freebsd:9.3:::::::*
	cpe:2.3:o:freebsd:freebsd:10.2:::::::*

Information

Published : 2018-07-13 13:29

Updated : 2019-10-09 16:19

NVD link : CVE-2016-6559

Mitre link : CVE-2016-6559

JSON object : View

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

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Products Affected

freebsd

freebsd

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