CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:A/AC:M/Au:S/C:N/I:N/A:P
CVSS3
Attack Vector
ADJACENT
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:A/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
12.6%
Malicious root users with access to a vCMP guest can disrupt service on adjacent vCMP guests running on the same host. Exploiting this vulnerability causes the vcmpd process on the adjacent vCMP guest to restart and produce a core file. This issue is only exploitable on a vCMP guest which is operating in ‘host-only’ or ‘bridged’ mode. vCMP guests which are ‘isolated’ are not impacted by this issue and do not provide mechanism to exploit the vulnerability. Guests which are deployed in Appliance mode may be impacted; however, the exploit is not possible from an Appliance mode guest. To exploit this vulnerability, root access on a guest system deployed as ‘host-only’ or ‘bridged’ mode is required. (CVE-2018-5518)
Impact
This vulnerability allows an authenticated root user on a vCMP guest to disrupt service on adjacent vCMP guests running on the same host.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from F5 Networks BIG-IP Solution K03165684.
#
# The text description of this plugin is (C) F5 Networks.
#
include('compat.inc');
if (description)
{
script_id(118619);
script_version("1.7");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/02");
script_cve_id("CVE-2018-5518");
script_name(english:"F5 Networks BIG-IP : vCMP vulnerability (K03165684)");
script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch.");
script_set_attribute(attribute:"description", value:
"Malicious root users with access to a vCMP guest can disrupt service
on adjacent vCMP guests running on the same host. Exploiting this
vulnerability causes the vcmpd process on the adjacent vCMP guest to
restart and produce a core file. This issue is only exploitable on a
vCMP guest which is operating in 'host-only' or 'bridged' mode. vCMP
guests which are 'isolated' are not impacted by this issue and do not
provide mechanism to exploit the vulnerability. Guests which are
deployed in Appliance mode may be impacted; however, the exploit is
not possible from an Appliance mode guest. To exploit this
vulnerability, root access on a guest system deployed as 'host-only'
or 'bridged' mode is required. (CVE-2018-5518)
Impact
This vulnerability allows an authenticated root user on a vCMP guest
to disrupt service on adjacent vCMP guests running on the same host.");
script_set_attribute(attribute:"see_also", value:"https://my.f5.com/manage/s/article/K03165684");
script_set_attribute(attribute:"solution", value:
"Upgrade to one of the non-vulnerable versions listed in the F5 Solution K03165684.");
script_set_cvss_base_vector("CVSS2#AV:A/AC:M/Au:S/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:A/AC:H/PR:H/UI:N/S:C/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-2018-5518");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"vuln_publication_date", value:"2018/05/02");
script_set_attribute(attribute:"patch_publication_date", value:"2018/05/01");
script_set_attribute(attribute:"plugin_publication_date", value:"2018/11/02");
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:/a:f5:big-ip_webaccelerator");
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) 2018-2023 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 = 'K03165684';
var vmatrix = {
'AFM': {
'affected': [
'14.0.0','13.0.0-13.1.0','12.0.0-12.1.3'
],
'unaffected': [
'14.1.0','13.1.0.6','12.1.3.4'
],
},
'AM': {
'affected': [
'14.0.0','13.0.0-13.1.0','12.0.0-12.1.3'
],
'unaffected': [
'14.1.0','13.1.0.6','12.1.3.4'
],
},
'APM': {
'affected': [
'14.0.0','13.0.0-13.1.0','12.0.0-12.1.3'
],
'unaffected': [
'14.1.0','13.1.0.6','12.1.3.4'
],
},
'ASM': {
'affected': [
'14.0.0','13.0.0-13.1.0','12.0.0-12.1.3'
],
'unaffected': [
'14.1.0','13.1.0.6','12.1.3.4'
],
},
'AVR': {
'affected': [
'14.0.0','13.0.0-13.1.0','12.0.0-12.1.3'
],
'unaffected': [
'14.1.0','13.1.0.6','12.1.3.4'
],
},
'DNS': {
'affected': [
'14.0.0','13.0.0-13.1.0','12.0.0-12.1.3'
],
'unaffected': [
'14.1.0','13.1.0.6','12.1.3.4'
],
},
'GTM': {
'affected': [
'14.0.0','13.0.0-13.1.0','12.0.0-12.1.3'
],
'unaffected': [
'14.1.0','13.1.0.6','12.1.3.4'
],
},
'LC': {
'affected': [
'14.0.0','13.0.0-13.1.0','12.0.0-12.1.3'
],
'unaffected': [
'14.1.0','13.1.0.6','12.1.3.4'
],
},
'LTM': {
'affected': [
'14.0.0','13.0.0-13.1.0','12.0.0-12.1.3'
],
'unaffected': [
'14.1.0','13.1.0.6','12.1.3.4'
],
},
'PEM': {
'affected': [
'14.0.0','13.0.0-13.1.0','12.0.0-12.1.3'
],
'unaffected': [
'14.1.0','13.1.0.6','12.1.3.4'
],
},
'WAM': {
'affected': [
'14.0.0','13.0.0-13.1.0','12.0.0-12.1.3'
],
'unaffected': [
'14.1.0','13.1.0.6','12.1.3.4'
],
}
};
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_NOTE,
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');
}
CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:A/AC:M/Au:S/C:N/I:N/A:P
CVSS3
Attack Vector
ADJACENT
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.0/AV:A/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
12.6%