CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:N/A:C
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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
81.3%
The XML parser in Expat does not use sufficient entropy for hash initialization, which allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted identifiers in an XML document. NOTE: this vulnerability exists because of an incomplete fix for CVE-2012-0876. (CVE-2016-5300)
Impact
An attacker may be able to cause a denial-of-service (DoS) attack by way ofcrafted identifiers in an XML document.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from F5 Networks BIG-IP Solution K70938105.
#
# The text description of this plugin is (C) F5 Networks.
#
include("compat.inc");
if (description)
{
script_id(94301);
script_version("2.16");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/03/10");
script_cve_id("CVE-2012-0876", "CVE-2016-5300");
script_bugtraq_id(52379);
script_name(english:"F5 Networks BIG-IP : Expat XML library vulnerability (K70938105)");
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:
"The XML parser in Expat does not use sufficient entropy for hash
initialization, which allows context-dependent attackers to cause a
denial of service (CPU consumption) via crafted identifiers in an XML
document. NOTE: this vulnerability exists because of an incomplete fix
for CVE-2012-0876. (CVE-2016-5300)
Impact
An attacker may be able to cause a denial-of-service (DoS) attack by
way ofcrafted identifiers in an XML document."
);
script_set_attribute(
attribute:"see_also",
value:"https://support.f5.com/csp/article/K70938105"
);
script_set_attribute(
attribute:"solution",
value:
"Upgrade to one of the non-vulnerable versions listed in the F5
Solution K70938105."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
script_set_cvss_temporal_vector("CVSS2#E:ND/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:"exploit_available", value:"false");
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:"cpe", value:"cpe:/h:f5:big-ip_protocol_security_manager");
script_set_attribute(attribute:"vuln_publication_date", value:"2012/07/03");
script_set_attribute(attribute:"patch_publication_date", value:"2016/10/26");
script_set_attribute(attribute:"plugin_publication_date", value:"2016/10/27");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2016-2021 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");
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 = "K70938105";
vmatrix = make_array();
# AFM
vmatrix["AFM"] = make_array();
vmatrix["AFM"]["affected" ] = make_list("13.0.0","12.0.0-12.1.3","11.6.1-11.6.3","11.4.0-11.5.6");
vmatrix["AFM"]["unaffected"] = make_list("14.1.0","14.0.0","13.1.0","13.0.1","12.1.3.2","11.6.3.2","11.5.7");
# AM
vmatrix["AM"] = make_array();
vmatrix["AM"]["affected" ] = make_list("13.0.0","12.0.0-12.1.3","11.6.1-11.6.3","11.4.0-11.5.6");
vmatrix["AM"]["unaffected"] = make_list("14.1.0","14.0.0","13.1.0","13.0.1","12.1.3.2","11.6.3.2","11.5.7");
# APM
vmatrix["APM"] = make_array();
vmatrix["APM"]["affected" ] = make_list("13.0.0","12.0.0-12.1.3","11.6.1-11.6.3","11.4.0-11.5.6");
vmatrix["APM"]["unaffected"] = make_list("14.1.0","14.0.0","13.1.0","13.0.1","12.1.3.2","11.6.3.2","11.5.7","11.2.1","10.2.1-10.2.4");
# ASM
vmatrix["ASM"] = make_array();
vmatrix["ASM"]["affected" ] = make_list("13.0.0","12.0.0-12.1.3","11.6.1-11.6.3","11.4.0-11.5.6");
vmatrix["ASM"]["unaffected"] = make_list("14.1.0","14.0.0","13.1.0","13.0.1","12.1.3.2","11.6.3.2","11.5.7","11.2.1","10.2.1-10.2.4");
# AVR
vmatrix["AVR"] = make_array();
vmatrix["AVR"]["affected" ] = make_list("13.0.0","12.0.0-12.1.3","11.6.1-11.6.3","11.4.0-11.5.6");
vmatrix["AVR"]["unaffected"] = make_list("14.1.0","14.0.0","13.1.0","13.0.1","12.1.3.2","11.6.3.2","11.5.7","11.2.1");
# GTM
vmatrix["GTM"] = make_array();
vmatrix["GTM"]["affected" ] = make_list("11.6.1-11.6.3","11.4.0-11.5.6");
vmatrix["GTM"]["unaffected"] = make_list("11.6.3.2","11.5.7","11.2.1","10.2.1-10.2.4");
# LC
vmatrix["LC"] = make_array();
vmatrix["LC"]["affected" ] = make_list("13.0.0","12.0.0-12.1.3","11.6.1-11.6.3","11.4.0-11.5.6");
vmatrix["LC"]["unaffected"] = make_list("14.1.0","14.0.0","13.1.0","13.0.1","12.1.3.2","11.6.3.2","11.5.7","11.2.1","10.2.1-10.2.4");
# LTM
vmatrix["LTM"] = make_array();
vmatrix["LTM"]["affected" ] = make_list("13.0.0","12.0.0-12.1.3","11.6.1-11.6.3","11.4.0-11.5.6");
vmatrix["LTM"]["unaffected"] = make_list("14.1.0","14.0.0","13.1.0","13.0.1","12.1.3.2","11.6.3.2","11.5.7","11.2.1","10.2.1-10.2.4");
# PEM
vmatrix["PEM"] = make_array();
vmatrix["PEM"]["affected" ] = make_list("13.0.0","12.0.0-12.1.3","11.6.1-11.6.3","11.4.0-11.5.6");
vmatrix["PEM"]["unaffected"] = make_list("14.1.0","14.0.0","13.1.0","13.0.1","12.1.3.2","11.6.3.2","11.5.7");
# PSM
vmatrix["PSM"] = make_array();
vmatrix["PSM"]["affected" ] = make_list("11.4.0-11.4.1");
vmatrix["PSM"]["unaffected"] = make_list("10.2.1-10.2.4");
if (bigip_is_affected(vmatrix:vmatrix, sol:sol))
{
if (report_verbosity > 0) security_hole(port:0, extra:bigip_report_get());
else security_hole(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");
}
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:N/I:N/A:C
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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
81.3%