CVE-2016-6559

Published on: 07/13/2018 12:00:00 AM UTC

Last Modified on: 03/23/2021 11:27:10 PM UTC

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

Certain versions of Freebsd from Freebsd contain the following vulnerability:

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.

  • CVE-2016-6559 has been assigned by [email protected] to track the vulnerability - currently rated as - currently rated as CRITICAL severity.
  • Affected Vendor/Software: BSD - libc library version link_ntoa()

CVSS3 Score: 9.8 - CRITICAL

Attack
Vector
Attack
Complexity
Privileges
Required
User
Interaction
NETWORK LOW NONE NONE
Scope Confidentiality
Impact
Integrity
Impact
Availability
Impact
UNCHANGED HIGH HIGH HIGH

CVSS2 Score: 7.5 - HIGH

Access
Vector
Access
Complexity
Authentication
NETWORK LOW NONE
Confidentiality
Impact
Integrity
Impact
Availability
Impact
PARTIAL PARTIAL PARTIAL

CVE References

Description Tags Link
Vulnerability Note VU#548487 - BSD libc contains a buffer overflow vulnerability Third Party Advisory
US Government Resource
www.kb.cert.org
text/html
URL Logo CERT-VN VU#548487
BSD libc CVE-2016-6559 Stack Buffer Overflow Vulnerability Third Party Advisory
VDB Entry
cve.report (archive)
text/html
URL Logo BID 94694
Vendor Advisory
www.freebsd.org
text/plain
FREEBSD FreeBSD-SA-16:37
libc link_ntoa() Buffer Overflow Lets Users Execute Arbitrary Code - SecurityTracker Third Party Advisory
VDB Entry
www.securitytracker.com
text/html
URL Logo SECTRACK 1037398

Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
Operating
System
FreebsdFreebsd10.1AllAllAll
Operating
System
FreebsdFreebsd10.2AllAllAll
Operating
System
FreebsdFreebsd10.3AllAllAll
Operating
System
FreebsdFreebsd11.0AllAllAll
Operating
System
FreebsdFreebsd9.3AllAllAll
Operating
System
FreebsdFreebsd10.1AllAllAll
Operating
System
FreebsdFreebsd10.2AllAllAll
Operating
System
FreebsdFreebsd10.3AllAllAll
Operating
System
FreebsdFreebsd11.0AllAllAll
Operating
System
FreebsdFreebsd9.3AllAllAll
  • cpe:2.3:o:freebsd:freebsd:10.1:*:*:*:*:*:*:*:
  • cpe:2.3:o:freebsd:freebsd:10.2:*:*:*:*:*:*:*:
  • 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:10.1:*:*:*:*:*:*:*:
  • cpe:2.3:o:freebsd:freebsd:10.2:*:*:*:*:*:*:*:
  • cpe:2.3:o:freebsd:freebsd:10.3:*:*:*:*:*:*:*:
  • cpe:2.3:o:freebsd:freebsd:11.0:*:*:*:*:*:*:*:
  • cpe:2.3:o:freebsd:freebsd:9.3:*:*:*:*:*:*:*: