F5 Networks BIG-IP : glibc vulnerability (K16365)

High Nessus Plugin ID 119731

Synopsis

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

Description

The nss_dns implementation of getnetbyname in GNU C Library (aka glibc) before 2.21, when the DNS backend in the Name Service Switch configuration is enabled, allows remote attackers to cause a denial of service (infinite loop) by sending a positive answer while a network name is being process. (CVE-2014-9402)

Impact

This vulnerability can only be exploited if you explicitly enable DNS for networks in the Name Service Switch Configuration file ( /etc/nsswitch.conf ). By default, the BIG-IP system does not have DNS enabled for networks in the Name Service Switch configuration and is not vulnerable. An attacker with local access and knowledge of how to make the glibc function trigger an exploit may be able to cause a denial of service (DoS).

Solution

Upgrade to one of the non-vulnerable versions listed in the F5 Solution K16365.

See Also

https://support.f5.com/csp/article/K16365

Plugin Details

Severity: High

ID: 119731

File Name: f5_bigip_SOL16365.nasl

Version: 1.3

Type: local

Published: 2018/12/18

Updated: 2019/02/21

Dependencies: 76940

Configuration: Enable paranoid mode

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.8

Temporal Score: 6.8

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

Temporal Vector: CVSS2#E:ND/RL:OF/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, Host/BIG-IP/hotfix, Host/BIG-IP/modules, Host/BIG-IP/version, Settings/ParanoidReport

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2015/04/03

Vulnerability Publication Date: 2015/02/24

Reference Information

CVE: CVE-2014-9402

BID: 71670