F5 Networks BIG-IP : Linux kernel vulnerability (K05513373)

High Nessus Plugin ID 104366


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


The blk_rq_map_user_iov function in block/blk-map.c in the Linux kernel before 4.8.14 does not properly restrict the type of iterator, which allows local users to read or write to arbitrary kernel memory locations or cause a denial of service (use-after-free) by leveraging access to a /dev/sg device. (CVE-2016-9576)


This vulnerability may allow locally authenticated users to read or write to arbitrary kernel memory locations or cause a denial of service (DoS).

Note : The exploit requires local shell access and can provide a user with root access to the system. On BIG-IP systems, shell access includes root privileges, making this exploit unnecessary.


Upgrade to one of the non-vulnerable versions listed in the F5 Solution K05513373.

See Also


Plugin Details

Severity: High

ID: 104366

File Name: f5_bigip_SOL05513373.nasl

Version: $Revision: 3.3 $

Type: local

Published: 2017/11/03

Modified: 2018/03/01

Dependencies: 76940

Risk Information

Risk Factor: High


Base Score: 7.2

Temporal Score: 5.6

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

Temporal Vector: CVSS2#E:POC/RL:OF/RC:ND


Base Score: 7.8

Temporal Score: 7

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

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:X

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, cpe:/h:f5:big-ip_protocol_security_manager

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2017/01/27

Reference Information

CVE: CVE-2016-9576

OSVDB: 148443