| code | #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from F5 Networks BIG-IP Solution K43450419.
#
# The text description of this plugin is (C) F5 Networks.
#
include("compat.inc");
if (description)
{
script_id(136137);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/11");
script_cve_id("CVE-2020-5871");
script_name(english:"F5 Networks BIG-IP : TMM vulnerability (K43450419)");
script_summary(english:"Checks the BIG-IP version.");
script_set_attribute(
attribute:"synopsis",
value:"The remote device is missing a vendor-supplied security patch."
);
script_set_attribute(
attribute:"description",
value:
"Undisclosed requests can lead to a denial of service (DoS) when sent
to BIG-IP HTTP/2 virtual servers. The problem can occur when ciphers,
which have been blacklisted by the HTTP/2 RFC, are used on backend
servers. This is a data-plane issue. There is no control-plane
exposure. (CVE-2020-5871)
Impact
This vulnerability affects only the virtual server associated with the
HTTP/2 profile that has the HTTP MRF Router setting selected. The
BIG-IP system may temporarily fail to process traffic as it recovers
from a Traffic Management Microkernel (TMM) restart. If the BIG-IP
system is configured for high availability (HA), it fails over to a
peer system."
);
script_set_attribute(
attribute:"see_also",
value:"https://support.f5.com/csp/article/K43450419"
);
script_set_attribute(
attribute:"solution",
value:
"Upgrade to one of the non-vulnerable versions listed in the F5
Solution K43450419."
);
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:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"potential_vulnerability", value:"true");
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_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:"vuln_publication_date", value:"2020/04/30");
script_set_attribute(attribute:"patch_publication_date", value:"2020/04/29");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/30");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_family(english:"F5 Networks Local Security Checks");
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", "Settings/ParanoidReport");
exit(0);
}
include("f5_func.inc");
if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
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");
sol = "K43450419";
vmatrix = make_array();
if (report_paranoia < 2) audit(AUDIT_PARANOID);
# AFM
vmatrix["AFM"] = make_array();
vmatrix["AFM"]["affected" ] = make_list("14.1.0-14.1.2");
vmatrix["AFM"]["unaffected"] = make_list("15.0.0","14.1.2.4");
# AM
vmatrix["AM"] = make_array();
vmatrix["AM"]["affected" ] = make_list("14.1.0-14.1.2");
vmatrix["AM"]["unaffected"] = make_list("15.0.0","14.1.2.4");
# APM
vmatrix["APM"] = make_array();
vmatrix["APM"]["affected" ] = make_list("14.1.0-14.1.2");
vmatrix["APM"]["unaffected"] = make_list("15.0.0","14.1.2.4");
# ASM
vmatrix["ASM"] = make_array();
vmatrix["ASM"]["affected" ] = make_list("14.1.0-14.1.2");
vmatrix["ASM"]["unaffected"] = make_list("15.0.0","14.1.2.4");
# AVR
vmatrix["AVR"] = make_array();
vmatrix["AVR"]["affected" ] = make_list("14.1.0-14.1.2");
vmatrix["AVR"]["unaffected"] = make_list("15.0.0","14.1.2.4");
# GTM
vmatrix["GTM"] = make_array();
vmatrix["GTM"]["affected" ] = make_list("14.1.0-14.1.2");
vmatrix["GTM"]["unaffected"] = make_list("15.0.0","14.1.2.4");
# LC
vmatrix["LC"] = make_array();
vmatrix["LC"]["affected" ] = make_list("14.1.0-14.1.2");
vmatrix["LC"]["unaffected"] = make_list("15.0.0","14.1.2.4");
# LTM
vmatrix["LTM"] = make_array();
vmatrix["LTM"]["affected" ] = make_list("14.1.0-14.1.2");
vmatrix["LTM"]["unaffected"] = make_list("15.0.0","14.1.2.4");
# PEM
vmatrix["PEM"] = make_array();
vmatrix["PEM"]["affected" ] = make_list("14.1.0-14.1.2");
vmatrix["PEM"]["unaffected"] = make_list("15.0.0","14.1.2.4");
if (bigip_is_affected(vmatrix:vmatrix, sol:sol))
{
if (report_verbosity > 0) security_warning(port:0, extra:bigip_report_get());
else security_warning(0);
exit(0);
}
else
{
tested = bigip_get_tested_modules();
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");
}
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