A race condition which may occur when discarding malformed packets can result in BIND exiting due to a REQUIRE assertion failure in dispatch.c. Versions affected: BIND 9.11.0 -> 9.11.7, 9.12.0 -> 9.12.4-P1, 9.14.0 -> 9.14.2. Also all releases of the BIND 9.13 development branch and version 9.15.0 of the BIND 9.15 development branch and BIND Supported Preview Edition versions 9.11.3-S1 -> 9.11.7-S1. (CVE-2019-6471)
Impact
A remote attacker, who could cause the BIND resolver to perform queries on a server, which responds deliberately with malformed answers, can cause named to exit and result in a denial-of-service (DoS) condition.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from F5 Networks BIG-IP Solution K10092301.
#
# The text description of this plugin is (C) F5 Networks.
#
include('compat.inc');
if (description)
{
script_id(127495);
script_version("1.8");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/02");
script_cve_id("CVE-2019-6471");
script_name(english:"F5 Networks BIG-IP : BIND vulnerability (K10092301)");
script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch.");
script_set_attribute(attribute:"description", value:
"A race condition which may occur when discarding malformed packets can
result in BIND exiting due to a REQUIRE assertion failure in
dispatch.c. Versions affected: BIND 9.11.0 -> 9.11.7, 9.12.0 ->
9.12.4-P1, 9.14.0 -> 9.14.2. Also all releases of the BIND 9.13
development branch and version 9.15.0 of the BIND 9.15 development
branch and BIND Supported Preview Edition versions 9.11.3-S1 ->
9.11.7-S1. (CVE-2019-6471)
Impact
A remote attacker, who could cause the BIND resolver to perform
queries on a server, which responds deliberately with malformed
answers, can cause named to exit and result in a denial-of-service
(DoS) condition.");
script_set_attribute(attribute:"see_also", value:"https://my.f5.com/manage/s/article/K10092301");
script_set_attribute(attribute:"solution", value:
"Upgrade to one of the non-vulnerable versions listed in the F5 Solution K10092301.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/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:H/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-2019-6471");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"vuln_publication_date", value:"2019/10/09");
script_set_attribute(attribute:"patch_publication_date", value:"2019/07/23");
script_set_attribute(attribute:"plugin_publication_date", value:"2019/08/12");
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) 2019-2023 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 = 'K10092301';
var vmatrix = {
'AFM': {
'affected': [
'15.0.0','14.1.0','14.0.0','13.1.0-13.1.1','12.1.0-12.1.4','11.6.1-11.6.4','11.5.2-11.5.9'
],
'unaffected': [
'15.1.0','15.0.1','14.1.2','14.0.1','13.1.3','12.1.5','11.6.5','11.5.10'
],
},
'AM': {
'affected': [
'15.0.0','14.1.0','14.0.0','13.1.0-13.1.1','12.1.0-12.1.4','11.6.1-11.6.4','11.5.2-11.5.9'
],
'unaffected': [
'15.1.0','15.0.1','14.1.2','14.0.1','13.1.3','12.1.5','11.6.5','11.5.10'
],
},
'APM': {
'affected': [
'15.0.0','14.1.0','14.0.0','13.1.0-13.1.1','12.1.0-12.1.4','11.6.1-11.6.4','11.5.2-11.5.9'
],
'unaffected': [
'15.1.0','15.0.1','14.1.2','14.0.1','13.1.3','12.1.5','11.6.5','11.5.10'
],
},
'ASM': {
'affected': [
'15.0.0','14.1.0','14.0.0','13.1.0-13.1.1','12.1.0-12.1.4','11.6.1-11.6.4','11.5.2-11.5.9'
],
'unaffected': [
'15.1.0','15.0.1','14.1.2','14.0.1','13.1.3','12.1.5','11.6.5','11.5.10'
],
},
'AVR': {
'affected': [
'15.0.0','14.1.0','14.0.0','13.1.0-13.1.1','12.1.0-12.1.4','11.6.1-11.6.4','11.5.2-11.5.9'
],
'unaffected': [
'15.1.0','15.0.1','14.1.2','14.0.1','13.1.3','12.1.5','11.6.5','11.5.10'
],
},
'DNS': {
'affected': [
'15.0.0','14.1.0','14.0.0','13.1.0-13.1.1','12.1.0-12.1.4','11.6.1-11.6.4','11.5.2-11.5.9'
],
'unaffected': [
'15.1.0','15.0.1','14.1.2','14.0.1','13.1.3','12.1.5','11.6.5','11.5.10'
],
},
'GTM': {
'affected': [
'15.0.0','14.1.0','14.0.0','13.1.0-13.1.1','12.1.0-12.1.4','11.6.1-11.6.4','11.5.2-11.5.9'
],
'unaffected': [
'15.1.0','15.0.1','14.1.2','14.0.1','13.1.3','12.1.5','11.6.5','11.5.10'
],
},
'LC': {
'affected': [
'15.0.0','14.1.0','14.0.0','13.1.0-13.1.1','12.1.0-12.1.4','11.6.1-11.6.4','11.5.2-11.5.9'
],
'unaffected': [
'15.1.0','15.0.1','14.1.2','14.0.1','13.1.3','12.1.5','11.6.5','11.5.10'
],
},
'LTM': {
'affected': [
'15.0.0','14.1.0','14.0.0','13.1.0-13.1.1','12.1.0-12.1.4','11.6.1-11.6.4','11.5.2-11.5.9'
],
'unaffected': [
'15.1.0','15.0.1','14.1.2','14.0.1','13.1.3','12.1.5','11.6.5','11.5.10'
],
},
'PEM': {
'affected': [
'15.0.0','14.1.0','14.0.0','13.1.0-13.1.1','12.1.0-12.1.4','11.6.1-11.6.4','11.5.2-11.5.9'
],
'unaffected': [
'15.1.0','15.0.1','14.1.2','14.0.1','13.1.3','12.1.5','11.6.5','11.5.10'
],
},
'WAM': {
'affected': [
'15.0.0','14.1.0','14.0.0','13.1.0-13.1.1','12.1.0-12.1.4','11.6.1-11.6.4','11.5.2-11.5.9'
],
'unaffected': [
'15.1.0','15.0.1','14.1.2','14.0.1','13.1.3','12.1.5','11.6.5','11.5.10'
],
}
};
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');
}