FreeBSD : FreeBSD -- Kernel stack disclosure in 4.3BSD compatibility layer (7cad4795-600a-11e6-a6c3-14dae9d210b8)

High Nessus Plugin ID 92926


The remote FreeBSD host is missing one or more security-related updates.


The implementation of historic stat(2) system call does not clear the output struct before copying it out to userland. Impact : An unprivileged user can read a portion of uninitialised kernel stack data, which may contain sensitive information, such as the stack guard, portions of the file cache or terminal buffers, which an attacker might leverage to obtain elevated privileges.


Update the affected packages.

See Also

Plugin Details

Severity: High

ID: 92926

File Name: freebsd_pkg_7cad4795600a11e6a6c314dae9d210b8.nasl

Version: $Revision: 2.1 $

Type: local

Published: 2016/08/12

Modified: 2016/08/12

Dependencies: 12634

Risk Information

Risk Factor: High

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:FreeBSD-kernel, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info, Settings/ParanoidReport

Patch Publication Date: 2016/08/11

Vulnerability Publication Date: 2016/05/31

Reference Information

FreeBSD: SA-16:21.43bsd