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F5 Networks BIG-IP : Linux kernel vulnerability (K54610514)

high Nessus Plugin ID 104307

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Synopsis

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

Description

The sg implementation in the Linux kernel through 4.9 does not properly restrict write operations in situations where the KERNEL_DS option is set, 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, related to block/bsg.c and drivers/scsi/sg.c. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-9576. (CVE-2016-10088)

Impact

This vulnerability may allowlocally 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.

Solution

Upgrade to one of the non-vulnerable versions listed in the F5 Solution K54610514.

See Also

https://support.f5.com/csp/article/K54610514

Plugin Details

Severity: High

ID: 104307

File Name: f5_bigip_SOL54610514.nasl

Version: 3.9

Type: local

Published: 11/1/2017

Updated: 3/9/2020

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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:U/RL:O/RC:C

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 Ease: No known exploits are available

Patch Publication Date: 1/27/2017

Vulnerability Publication Date: 12/28/2016

Reference Information

CVE: CVE-2016-10088, CVE-2016-9576