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F5 Networks BIG-IP : Linux kernel vulnerability (K21632201)

medium Nessus Plugin ID 90455

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Synopsis

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

Description

The tty_open function in drivers/tty/tty_io.c in the Linux kernel before 3.1.1 mishandles a driver-lookup failure, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via crafted access to a device file under the /dev/pts directory. (CVE-2011-5321)

Impact

A local, unprivileged user may exploit this vulnerability and create a situation where the system stops responding.

In the default configuration, only an administrator user has advanced shell access. If a non-administrator user is given advanced shell access in a non-default configuration, then the possibility of privilege escalation increases the exposure of this vulnerability.

Solution

Upgrade to one of the non-vulnerable versions listed in the F5 Solution K21632201.

See Also

https://support.f5.com/csp/article/K21632201

Plugin Details

Severity: Medium

ID: 90455

File Name: f5_bigip_SOL21632201.nasl

Version: 2.14

Type: local

Published: 4/13/2016

Updated: 3/10/2021

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 4.3

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

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:N/I:N/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_wan_optimization_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, Settings/ParanoidReport, Host/BIG-IP/hotfix, Host/BIG-IP/modules, Host/BIG-IP/version

Exploit Ease: No known exploits are available

Patch Publication Date: 4/7/2016

Vulnerability Publication Date: 5/2/2016

Reference Information

CVE: CVE-2011-5321

BID: 73141