CVE-2016-6559 — Classic Buffer Overflow in Apple OS X EL Capitan V10.11.6 AND Security Update 2016-004

CWE-120 — Classic Buffer OverflowCWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer6 documents4 sources
Severity
9.8CRITICALNVD
EPSS
1.6%
top 18.54%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
5
Apple IOSApple OS X EL Capitan V10.11.6 AND Security Update 2016-004Apple Watchos+2 more
Timeline
PublishedJul 13
Latest updateMay 13

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 functiona…

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages4 packages

▶CVEListV5bsd/libc_librarylink_ntoa()
▶Appleapple/ios9.3.3
▶Appleapple/watchos2.2.2

Also affects: Freebsd 10.1, 10.2, 10.3, 11.0, 9.3

🔴Vulnerability Details

1
GHSA
GHSA-hxwf-fxc3-j23c: Improper bounds checking of the obuf variable in the link_ntoa() function in linkaddr↗2022-05-13
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📋Vendor Advisories

4
BSD
FreeBSD-SA-16:37.libc: link_ntoa(3) buffer overflow↗2016-12-06
▶
Apple
CVE-2016-6559: OS X El Capitan v10.11.6 and Security Update 2016-004↗2016-07-18
▶
Apple
CVE-2016-6559: watchOS 2.2.2↗2016-07-18
▶
Apple
CVE-2016-6559: iOS 9.3.3↗2016-07-18
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