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

high Nessus Plugin ID 92926

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Synopsis

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

Description

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.

Solution

Update the affected packages.

See Also

http://www.nessus.org/u?9bba2f58

Plugin Details

Severity: High

ID: 92926

File Name: freebsd_pkg_7cad4795600a11e6a6c314dae9d210b8.nasl

Version: 2.4

Type: local

Published: 8/12/2016

Updated: 1/4/2021

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Vulnerability Information

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

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

Patch Publication Date: 8/11/2016

Vulnerability Publication Date: 5/31/2016

Reference Information

FreeBSD: SA-16:21.43bsd