F5 Networks BIG-IP : OpenSSL vulnerability (K14363514)

Medium Nessus Plugin ID 105333

Synopsis

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

Description

There is a carry propagating bug in the x86_64 Montgomery squaring procedure in OpenSSL before 1.0.2m and 1.1.0 before 1.1.0g. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline.
The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen. (CVE-2017-3736)

Impact

For configurations using iRulesLX, the connection between the iAppsLX administrative interface and clients is vulnerable to high-complexity attacks on DH parameters used in the HTTPS session. This vulnerability applies to the following platforms :

BIG-IP I4800, I4600 (C115)

BIG-IP I2800, I2600 (C117)

BIG-IP I10800, I10600 (C116)

BIG-IP I7800, I7600 (C118)

Solution

Upgrade to one of the non-vulnerable versions listed in the F5 Solution K14363514.

See Also

https://support.f5.com/csp/#/article/K14363514

Plugin Details

Severity: Medium

ID: 105333

File Name: f5_bigip_SOL14363514.nasl

Version: Revision: 3.1

Type: local

Published: 2017/12/18

Modified: 2017/12/18

Dependencies: 76940

Risk Information

Risk Factor: Medium

CVSSv2

Base Score: 4

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

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_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

Patch Publication Date: 2017/12/15

Reference Information

CVE: CVE-2017-3736