F5 Networks BIG-IP : Linux kernel vulnerability (K80440915)

High Nessus Plugin ID 118699

Synopsis

The remote device is missing a vendor-supplied security patch.

Description

The mm subsystem in the Linux kernel through 4.10.10 does not properly enforce the CONFIG_STRICT_DEVMEM protection mechanism, which allows local users to read or write to kernel memory locations in the first megabyte (and bypass slab-allocation access restrictions) via an application that opens the /dev/mem file, related to arch/x86/mm/init.c and drivers/char/mem.c. (CVE-2017-7889)

Impact

Exploitation of this issue requires local administrative-level shell access. A successful exploit of this vulnerability allows unauthorized disclosure of information, unauthorized modification of data, and disruption of service. F5 recommends that you permit management access to F5 products only over a secure network and restrict command line access for affected systems to only trusted users.

Solution

Upgrade to one of the non-vulnerable versions listed in the F5 Solution K80440915.

See Also

https://support.f5.com/csp/#/article/K80440915

Plugin Details

Severity: High

ID: 118699

File Name: f5_bigip_SOL80440915.nasl

Version: 1.1

Type: local

Published: 2018/11/02

Modified: 2018/11/02

Dependencies: 76940

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.2

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

CVSS v3.0

Base Score: 7.8

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

Vulnerability Information

CPE: cpe:/a:f5:big-ip_access_policy_manager, cpe:/a:f5:big-ip_advanced_firewall_manager, cpe:/a:f5:big-ip_application_acceleration_manager, cpe:/a:f5:big-ip_application_security_manager, cpe:/a:f5:big-ip_application_visibility_and_reporting, cpe:/a:f5:big-ip_global_traffic_manager, cpe:/a:f5:big-ip_link_controller, cpe:/a:f5:big-ip_local_traffic_manager, cpe:/a:f5:big-ip_policy_enforcement_manager, cpe:/a:f5:big-ip_webaccelerator, cpe:/h:f5:big-ip

Required KB Items: Host/local_checks_enabled, Host/BIG-IP/hotfix, Host/BIG-IP/modules, Host/BIG-IP/version, Settings/ParanoidReport

Patch Publication Date: 2018/06/28

Reference Information

CVE: CVE-2017-7889