Vulnerability Description
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 Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Freebsd | Freebsd | 9.3 |
Related Weaknesses (CWE)
References
- http://www.securitytracker.com/id/1037398Third Party AdvisoryVDB Entry
- https://www.freebsd.org/security/advisories/FreeBSD-SA-16:37.libc.ascVendor Advisory
- https://www.kb.cert.org/vuls/id/548487Third Party AdvisoryUS Government Resource
- https://www.securityfocus.com/bid/94694Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1037398Third Party AdvisoryVDB Entry
- https://www.freebsd.org/security/advisories/FreeBSD-SA-16:37.libc.ascVendor Advisory
- https://www.kb.cert.org/vuls/id/548487Third Party AdvisoryUS Government Resource
- https://www.securityfocus.com/bid/94694Third Party AdvisoryVDB Entry
FAQ
What is CVE-2016-6559?
CVE-2016-6559 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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...
How severe is CVE-2016-6559?
CVE-2016-6559 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2016-6559?
Check the references section above for vendor advisories and patch information. Affected products include: Freebsd Freebsd.