5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
0.001 Low
EPSS
Percentile
42.6%
While processing specifically crafted traffic using the default ‘xnet’ driver, BIG-IP Virtual Edition (VE) instances hosted in Amazon Web Services (AWS) may experience a Traffic Management Microkernel (TMM) restart. (CVE-2020-5856)
Impact
A remote attacker may be able to perform a denial-of-service (DoS) attack on an AWS-hosted BIG-IP Virtual Edition (VE) system by causing the TMMprocess to restart.
BIG-IP VEs hosted in any other virtual environment, and hardware appliances, are not affected by this issue.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from F5 Networks BIG-IP Solution K00025388.
#
# The text description of this plugin is (C) F5 Networks.
#
include('compat.inc');
if (description)
{
script_id(133510);
script_version("1.6");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/02");
script_cve_id("CVE-2020-5856");
script_name(english:"F5 Networks BIG-IP : BIG-IP TMM AWS vulnerability (K00025388)");
script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch.");
script_set_attribute(attribute:"description", value:
"While processing specifically crafted traffic using the default 'xnet'
driver, BIG-IP Virtual Edition (VE) instances hosted in Amazon Web
Services (AWS) may experience a Traffic Management Microkernel (TMM)
restart. (CVE-2020-5856)
Impact
A remote attacker may be able to perform a denial-of-service (DoS)
attack on an AWS-hosted BIG-IP Virtual Edition (VE) system by causing
the TMMprocess to restart.
BIG-IP VEs hosted in any other virtual environment, and hardware
appliances, are not affected by this issue.");
script_set_attribute(attribute:"see_also", value:"https://my.f5.com/manage/s/article/K00025388");
script_set_attribute(attribute:"solution", value:
"Upgrade to one of the non-vulnerable versions listed in the F5 Solution K00025388.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-5856");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"vuln_publication_date", value:"2020/02/06");
script_set_attribute(attribute:"patch_publication_date", value:"2020/02/05");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/02/06");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_access_policy_manager");
script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_advanced_firewall_manager");
script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_application_acceleration_manager");
script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_application_security_manager");
script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_application_visibility_and_reporting");
script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_domain_name_system");
script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_global_traffic_manager");
script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_link_controller");
script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_local_traffic_manager");
script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_policy_enforcement_manager");
script_set_attribute(attribute:"cpe", value:"cpe:/h:f5:big-ip");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"F5 Networks Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2020-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("f5_bigip_detect.nbin");
script_require_keys("Host/local_checks_enabled", "Host/BIG-IP/hotfix", "Host/BIG-IP/modules", "Host/BIG-IP/version");
exit(0);
}
include('f5_func.inc');
if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var version = get_kb_item('Host/BIG-IP/version');
if ( ! version ) audit(AUDIT_OS_NOT, 'F5 Networks BIG-IP');
if ( isnull(get_kb_item('Host/BIG-IP/hotfix')) ) audit(AUDIT_KB_MISSING, 'Host/BIG-IP/hotfix');
if ( ! get_kb_item('Host/BIG-IP/modules') ) audit(AUDIT_KB_MISSING, 'Host/BIG-IP/modules');
var sol = 'K00025388';
var vmatrix = {
'AFM': {
'affected': [
'15.0.0-15.0.1','14.1.0-14.1.2'
],
'unaffected': [
'15.1.0','15.0.1.2','14.1.2.3'
],
},
'AM': {
'affected': [
'15.0.0-15.0.1','14.1.0-14.1.2'
],
'unaffected': [
'15.1.0','15.0.1.2','14.1.2.3'
],
},
'APM': {
'affected': [
'15.0.0-15.0.1','14.1.0-14.1.2'
],
'unaffected': [
'15.1.0','15.0.1.2','14.1.2.3'
],
},
'ASM': {
'affected': [
'15.0.0-15.0.1','14.1.0-14.1.2'
],
'unaffected': [
'15.1.0','15.0.1.2','14.1.2.3'
],
},
'AVR': {
'affected': [
'15.0.0-15.0.1','14.1.0-14.1.2'
],
'unaffected': [
'15.1.0','15.0.1.2','14.1.2.3'
],
},
'DNS': {
'affected': [
'15.0.0-15.0.1','14.1.0-14.1.2'
],
'unaffected': [
'15.1.0','15.0.1.2','14.1.2.3'
],
},
'GTM': {
'affected': [
'15.0.0-15.0.1','14.1.0-14.1.2'
],
'unaffected': [
'15.1.0','15.0.1.2','14.1.2.3'
],
},
'LC': {
'affected': [
'15.0.0-15.0.1','14.1.0-14.1.2'
],
'unaffected': [
'15.1.0','15.0.1.2','14.1.2.3'
],
},
'LTM': {
'affected': [
'15.0.0-15.0.1','14.1.0-14.1.2'
],
'unaffected': [
'15.1.0','15.0.1.2','14.1.2.3'
],
},
'PEM': {
'affected': [
'15.0.0-15.0.1','14.1.0-14.1.2'
],
'unaffected': [
'15.1.0','15.0.1.2','14.1.2.3'
],
}
};
if (bigip_is_affected(vmatrix:vmatrix, sol:sol))
{
var extra = NULL;
if (report_verbosity > 0) extra = bigip_report_get();
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : extra
);
}
else
{
var tested = bigip_get_tested_modules();
var audit_extra = 'For BIG-IP module(s) ' + tested + ',';
if (tested) audit(AUDIT_INST_VER_NOT_VULN, audit_extra, version);
else audit(AUDIT_HOST_NOT, 'running any of the affected modules');
}
Vendor | Product | Version | CPE |
---|---|---|---|
f5 | big-ip_domain_name_system | cpe:/a:f5:big-ip_domain_name_system | |
f5 | big-ip_global_traffic_manager | cpe:/a:f5:big-ip_global_traffic_manager | |
f5 | big-ip_link_controller | cpe:/a:f5:big-ip_link_controller | |
f5 | big-ip_access_policy_manager | cpe:/a:f5:big-ip_access_policy_manager | |
f5 | big-ip_advanced_firewall_manager | cpe:/a:f5:big-ip_advanced_firewall_manager | |
f5 | big-ip_application_acceleration_manager | cpe:/a:f5:big-ip_application_acceleration_manager | |
f5 | big-ip_application_security_manager | cpe:/a:f5:big-ip_application_security_manager | |
f5 | big-ip_application_visibility_and_reporting | cpe:/a:f5:big-ip_application_visibility_and_reporting | |
f5 | big-ip_local_traffic_manager | cpe:/a:f5:big-ip_local_traffic_manager | |
f5 | big-ip_policy_enforcement_manager | cpe:/a:f5:big-ip_policy_enforcement_manager |
5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
0.001 Low
EPSS
Percentile
42.6%