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.

According to its self-reported version number, the remote pfSense install is affected by multiple vulnerabilities as stated in the referenced vendor advisories.

A specially crafted argument can trigger a static buffer overflow in the library, with possibility to rewrite following static buffers that belong to other library functions. Impact : Due to very limited use of the function in the existing applications, and limited length of the overflow, exploitation of the vulnerability does not seem feasible.
None of the utilities and daemons in the base system are known to be vulnerable. However, careful review of third party software that may use the function was not performed.

The version of iOS running on the mobile device is prior to 9.3.3. It is, therefore, affected by multiple vulnerabilities, the most serious of which can result in remote code execution, in the following components :

  - Calendar
  - CoreGraphics
  - FaceTime
  - ImageIO
  - IOAcceleratorFamily
  - IOHIDFamily
  - Kernel
  - libxml2
  - libxslt
  - Safari
  - Sandbox Profiles
  - Siri Contacts
  - Web Media
  - WebKit
  - WebKit JavaScript Bindings
  - WebKit Page Loading

ID	Name	Product	Family	Severity
106503	pfSense < 2.3.3 Multiple Vulnerabilities (SA-17_01 - SA-17_03)	Nessus	Firewalls	critical
95585	FreeBSD : FreeBSD -- link_ntoa(3) buffer overflow (0282269d-bbee-11e6-b1cf-14dae9d210b8)	Nessus	FreeBSD Local Security Checks	critical
92359	Apple iOS < 9.3.3 Multiple Vulnerabilities	Nessus	Mobile Devices	critical

Detections

Analytics

CVE-2016-6559

critical

Tenable Plugins

critical

critical

critical