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FreeBSD : FreeBSD -- System call kernel data register leak (683c714d-2d91-11e9-bf3e-a4badb2f4699)

medium Nessus Plugin ID 122084

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Synopsis

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

Description

The callee-save registers are used by kernel and for some of them (%r8, %r10, and for non-PTI configurations, %r9) the content is not sanitized before return from syscalls, potentially leaking sensitive information. Impact : Typically an address of some kernel data structure used in the syscall implementation, is exposed.

Solution

Update the affected packages.

See Also

http://www.nessus.org/u?2f48e626

Plugin Details

Severity: Medium

ID: 122084

File Name: freebsd_pkg_683c714d2d9111e9bf3ea4badb2f4699.nasl

Version: 1.3

Type: local

Published: 2/11/2019

Updated: 2/12/2020

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.6

Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:N/A:N

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

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

Exploit Ease: No known exploits are available

Patch Publication Date: 2/11/2019

Vulnerability Publication Date: 2/5/2019

Reference Information

CVE: CVE-2019-5595

FreeBSD: SA-19:01.syscall