F5 Networks BIG-IP : OpenSSL vulnerability (K21665601)

Medium Nessus Plugin ID 118642

Synopsis

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

Description

During key agreement in a TLS handshake using a DH(E) based ciphersuite a malicious server can send a very large prime value to the client. This will cause the client to spend an unreasonably long period of time generating a key for this prime resulting in a hang until the client has finished. This could be exploited in a Denial Of Service attack. Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h).
Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2-1.0.2o). (CVE-2018-0732)

Impact

A remote attacker may be able to cause a denial-of-service (DoS) attack.

Solution

Upgrade to one of the non-vulnerable versions listed in the F5 Solution K21665601.

See Also

https://support.f5.com/csp/#/article/K21665601

Plugin Details

Severity: Medium

ID: 118642

File Name: f5_bigip_SOL21665601.nasl

Version: 1.1

Type: local

Published: 2018/11/02

Modified: 2018/11/02

Dependencies: 76940

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 5

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

CVSS v3.0

Base Score: 7.5

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

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

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

Patch Publication Date: 2018/07/20

Reference Information

CVE: CVE-2018-0732