F5 Networks BIG-IP : Linux kernel vulnerability (K07020416)

medium Nessus Plugin ID 151461

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New! Plugin Severity Now Using CVSS v3

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Synopsis

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

Description

The timer_create syscall implementation in kernel/time/posix-timers.c in the Linux kernel before 4.14.8 doesn't properly validate the sigevent->sigev_notify field, which leads to out-of-bounds access in the show_timer function (called when /proc/$PID/timers is read). This allows userspace applications to read arbitrary kernel memory (on a kernel built with CONFIG_POSIX_TIMERS and CONFIG_CHECKPOINT_RESTORE).
(CVE-2017-18344)

Impact

A local attacker may use this vulnerability to expose sensitive information or cause a denial of service (DoS), makingthe system unresponsive.

Solution

Upgrade to one of the non-vulnerable versions listed in the F5 Solution K07020416.

See Also

https://support.f5.com/csp/article/K07020416

Plugin Details

Severity: Medium

ID: 151461

File Name: f5_bigip_SOL07020416.nasl

Version: 1.2

Type: local

Published: 7/8/2021

Updated: 7/12/2021

Dependencies: f5_bigip_detect.nbin

Configuration: Enable paranoid mode

Risk Information

VPR

Risk Factor: Medium

Score: 6.9

CVSS v2

Risk Factor: Low

Base Score: 2.1

Temporal Score: 1.8

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

Temporal Vector: E:H/RL:OF/RC:C

CVSS v3

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 5.3

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

Temporal Vector: E:H/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:/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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 12/7/2020

Vulnerability Publication Date: 7/26/2018

Exploitable With

CANVAS (CANVAS)

Reference Information

CVE: CVE-2017-18344