F5 Networks BIG-IP : SLOTH: TLS 1.2 handshake vulnerability (K02201365) (SLOTH)

Medium Nessus Plugin ID 88703


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


A flaw was found in the way TLS 1.2 uses RSA+MD5 signatures with Client Authentication and ServerKeyExchange messages during a TLS 1.2 handshakes. An attacker with a Man-in-the-Middle network position and the ability to force / observe the use of RSA+MD5 during a TLS Handshake, may be able to successfully generate a hash collision and impersonate a TLS client or server. The vulnerability of CVE-2015-7575 is relevant to cryptography software which supports TLS 1.2 only as earlier versions of TLS used different hash functionality in those protocols. (CVE-2015-7575)


Upgrade to one of the non-vulnerable versions listed in the F5 Solution K02201365.

See Also


Plugin Details

Severity: Medium

ID: 88703

File Name: f5_bigip_SOL02201365.nasl

Version: 1.11

Type: local

Published: 2016/02/12

Updated: 2019/01/04

Dependencies: 76940

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 4.3

Temporal Score: 3.2

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

Base Score: 5.9

Temporal Score: 5.2

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

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:/h:f5:big-ip

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

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2016/01/22

Reference Information

CVE: CVE-2015-7575