Vulnerability Name:

CVE-2016-6559

Assigned:2016-12-16
Published:2016-12-16
Updated:2018-07-14
Summary: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 Severity:7.3 High (CCN CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)
6.4 Medium (CCN Temporal CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): Low
CVSS v2 Severity:7.5 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
References:Source: SECTRACK
Type: UNKNOWN
1037398

Source: XF
Type: UNKNOWN
freebsd-cve20166559-bo(119477)

Source: FREEBSD
Type: UNKNOWN
FreeBSD-SA-16:37

Source: CERT-VN
Type: UNKNOWN
VU#548487

Source: BID
Type: UNKNOWN
94694

Vulnerable Configuration:
Configuration CCN 1:
  • cpe:/o:freebsd:freebsd:9.2:prerelease:*:*:*:*:*:*

  • Denotes that component is vulnerable
    BACK
    freebsd freebsd 9.2 prerelease