F5 Networks BIG-IP : Side-channel processor vulnerability (K54252492)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from F5 Networks BIG-IP Solution K54252492.
#
# The text description of this plugin is (C) F5 Networks.
#

include("compat.inc");

if (description)
{
  script_id(125482);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/03/10");

  script_cve_id("CVE-2018-3693");

  script_name(english:"F5 Networks BIG-IP : Side-channel processor vulnerability (K54252492)");
  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:
"Systems with microprocessors utilizing speculative execution and
branch prediction may allow unauthorized disclosure of information to
an attacker with local user access via a speculative buffer overflow
and side-channel analysis. (CVE-2018-3693 also known as Spectre or
Spectre-NG Variant 1.1)

Bounds checking bypass - store

Impact

For products with None in the Versions known to be vulnerable column,
there is no impact.

F5 continues to investigate the impact of the Spectre-NG1.1
vulnerability on our products.F5 is also monitoring developments about
Spectre-NG 1.2 and awaiting evaluation by hardware vendors. F5 is
focused onproviding patched releases as soon as we have fully tested
and verified fixes. F5 will update this article with the most current
information as soon as it is confirmed.

BIG-IP

First and foremost, there is no exposure on BIG-IP products by way
ofthe data plane. All exposure is limited to the control plane (also
known as the management plane).

Furthermore, on the control plane, the vulnerability is exploitable
only by four authorized, authenticated account roles: Administrator,
Resource Administrator, Manager, and iRules Manager. You must be
authorized to access the system in one of these roles to even attempt
to exploit the vulnerability.

This vulnerability requires an attacker who can provideand runbinary
code of their choosing on the BIG-IP platform.

These conditions severely restrict the exposure risk of BIG-IP
products.

For single-tenancy products, such as astandalone BIG-IP appliance, the
risk is limited to a local, authorized user using this vulnerability
to read information from memory that they would not normally be able
to access, exceeding their privileges. Effectively, the risk in a
single-tenancy situation is that a user may be able to access
kernel-space memory, instead of being limited to their own user-space.

For multi-tenancy environments, such as cloud, VE, and Virtual
Clustered Multiprocessing (vCMP), the same local risk applies as with
single-tenancy environments local kernel memory access. Additionally,
the risk of attacks across guests exists, or attacks against the
hypervisor/host. In cloud and VE environments, preventing these new
attacks falls on the hypervisor/host platform, outside the scope of
F5's ability to support or patch. Please contact your cloud provider
or hypervisor vendor to ensure their platforms or products are
protected against Spectre-NG.

For vCMP environments, F5 believes that while the Spectre-NG Variant
1.1 attackdoes offer a theoretical possibility of guest-to-guest or
guest-to-host attacks, these would be very difficult to successfully
conduct in the BIG-IP environment.

F5 is working with our hardware component vendors to determine the
scope of this vulnerability across our various generations of hardware
platforms. All of the information we currently have from our vendors
is represented in this Security Advisory. We are working to obtain the
remaining information from our vendors and will update the security
advisory as we receive new information regarding our hardware
platforms.

We are also testing the fixes produced by the Linux community. We are
conducting anextensive test campaign to characterize the impact of the
fixes on system performance and stabilityto ensure, as best we can, a
good experience for our customers. We do not want to rush the process
and release fixes without a full understanding of any potential
issues. Given the limited exposure, as detailed above, the complexity
of the fixes, and the potential issues that we and others have seen,
we believe a detailed approach is warranted and that rushing a fix
could result in an impact to system stability or unacceptable
performance costs. We will update this article with details of our
fixes as they become available.

To determine if this vulnerability affects aplatform and the processor
type each platform uses, refer to the following table.

Note : In the following table, only one entry is shown for platform
models that may have several variants. For example, BIG-IP 11000,
BIG-IP 11050, BIG-IP 11050F, and BIG-IP 11050N are all vulnerable and
included in the table as 'BIG-IP 110x0'. Some platforms may have
multiple vendor processors, such as the iSeries platforms, which have
one or more Intel core processors and may have a vulnerable ARM
processor in one or more subsystems. F5 does not believe that ARM
processors in these subsystems are accessible to attackers, unless
some other code-execution vulnerability is present, but the
information is being provided out of an abundance of caution.

Model Processor type Vulnerable to CVE-2018-3693 Spectre-NG Variant
1.1 VIPRION B21x0 Intel Y VIPRION B2250 Intel Y VIPRION B4100 AMD Y
VIPRION B4200 AMD Y VIPRION B43x0 Intel Y VIPRION B44x0 Intel Y BIG-IP
800 Intel Y** BIG-IP 1600 Intel Y** BIG-IP 3600 Intel Y** BIG-IP 3900
Intel Y** BIG-IP2xx0 Intel Y BIG-IP4xx0 Intel Y BIG-IP5xx0 Intel Y
BIG-IP7xx0 Intel Y BIG-IP10xx0 Intel Y BIG-IP12xx0 Intel Y BIG-IPi2x00
Intel, ARM Y BIG-IPi4x00 Intel, ARM Y BIG-IPi5x00 Intel, ARM Y
BIG-IPi7x00 Intel, ARM Y BIG-IPi10x00 Intel, ARM Y BIG-IP6400 AMD Y
BIG-IP6900 AMD Y BIG-IP89x0 AMD Y BIG-IP110x0 AMD Y

**Intel and AMD have not responded to requests for information
relating to the specific processors used in these platforms.
Therefore, based on their public statements and in the interests of
security, F5 will proceed as if these platforms are vulnerable.

Note : Platform models that have reached End of Technical Support
(EoTS) will not be evaluated. For more information, refer toK4309: F5
platform lifecycle support policy.

BIG-IQ and Enterprise Manager

Systems with microprocessors that use speculative execution and
indirect branch prediction may allow unauthorized disclosure of
information to an attacker with local user access by way ofa
side-channel analysis.

To determine if this vulnerability affects each platform and the
processor type each platform uses, refer to the following table.

Model Processor type Vulnerable to CVE-2018-3693 Spectre-NG Variant
1.1 BIG-IQ 7000 Intel Y Enterprise Manager 4000 Intel Y**

**Intel hasnot responded to requests for information relating to the
specific processors used in these platforms. Therefore, based on their
public statements and in the interests of security, F5 will proceed as
if these platforms are vulnerable.

Note : Platform models that have reached End of Technical Support
(EoTS) will not be evaluated. For more information, refer toK4309: F5
platform lifecycle support policy.

Traffix

Systems with microprocessors that use speculative execution and
indirect branch prediction may allow unauthorized disclosure of
information to an attacker with local user access by way of a
side-channel analysis."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://support.f5.com/csp/article/K4309"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://support.f5.com/csp/article/K54252492"
  );
  script_set_attribute(
    attribute:"solution",
    value:
"Upgrade to one of the non-vulnerable versions listed in the F5
Solution K54252492."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:C/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N");
  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:/a:f5:big-ip_webaccelerator");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:f5:big-ip");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/07/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/08/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/05/29");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2019-2021 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", "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 = "K54252492";
vmatrix = make_array();

if (report_paranoia < 2) audit(AUDIT_PARANOID);

# AFM
vmatrix["AFM"] = make_array();
vmatrix["AFM"]["affected"  ] = make_list("14.0.0-14.1.2","13.0.0-13.1.1","12.1.0-12.1.4","11.6.1-11.6.3","11.5.1-11.5.8","11.2.1");
vmatrix["AFM"]["unaffected"] = make_list("15.0.0","14.1.2.3");

# AM
vmatrix["AM"] = make_array();
vmatrix["AM"]["affected"  ] = make_list("14.0.0-14.1.2","13.0.0-13.1.1","12.1.0-12.1.4","11.6.1-11.6.3","11.5.1-11.5.8","11.2.1");
vmatrix["AM"]["unaffected"] = make_list("15.0.0","14.1.2.3");

# APM
vmatrix["APM"] = make_array();
vmatrix["APM"]["affected"  ] = make_list("14.0.0-14.1.2","13.0.0-13.1.1","12.1.0-12.1.4","11.6.1-11.6.3","11.5.1-11.5.8","11.2.1");
vmatrix["APM"]["unaffected"] = make_list("15.0.0","14.1.2.3");

# ASM
vmatrix["ASM"] = make_array();
vmatrix["ASM"]["affected"  ] = make_list("14.0.0-14.1.2","13.0.0-13.1.1","12.1.0-12.1.4","11.6.1-11.6.3","11.5.1-11.5.8","11.2.1");
vmatrix["ASM"]["unaffected"] = make_list("15.0.0","14.1.2.3");

# AVR
vmatrix["AVR"] = make_array();
vmatrix["AVR"]["affected"  ] = make_list("14.0.0-14.1.2","13.0.0-13.1.1","12.1.0-12.1.4","11.6.1-11.6.3","11.5.1-11.5.8","11.2.1");
vmatrix["AVR"]["unaffected"] = make_list("15.0.0","14.1.2.3");

# GTM
vmatrix["GTM"] = make_array();
vmatrix["GTM"]["affected"  ] = make_list("14.0.0-14.1.2","13.0.0-13.1.1","12.1.0-12.1.4","11.6.1-11.6.3","11.5.1-11.5.8","11.2.1");
vmatrix["GTM"]["unaffected"] = make_list("15.0.0","14.1.2.3");

# LC
vmatrix["LC"] = make_array();
vmatrix["LC"]["affected"  ] = make_list("14.0.0-14.1.2","13.0.0-13.1.1","12.1.0-12.1.4","11.6.1-11.6.3","11.5.1-11.5.8","11.2.1");
vmatrix["LC"]["unaffected"] = make_list("15.0.0","14.1.2.3");

# LTM
vmatrix["LTM"] = make_array();
vmatrix["LTM"]["affected"  ] = make_list("14.0.0-14.1.2","13.0.0-13.1.1","12.1.0-12.1.4","11.6.1-11.6.3","11.5.1-11.5.8","11.2.1");
vmatrix["LTM"]["unaffected"] = make_list("15.0.0","14.1.2.3");

# PEM
vmatrix["PEM"] = make_array();
vmatrix["PEM"]["affected"  ] = make_list("14.0.0-14.1.2","13.0.0-13.1.1","12.1.0-12.1.4","11.6.1-11.6.3","11.5.1-11.5.8","11.2.1");
vmatrix["PEM"]["unaffected"] = make_list("15.0.0","14.1.2.3");

# WAM
vmatrix["WAM"] = make_array();
vmatrix["WAM"]["affected"  ] = make_list("14.0.0-14.1.2","13.0.0-13.1.1","12.1.0-12.1.4","11.6.1-11.6.3","11.5.1-11.5.8","11.2.1");
vmatrix["WAM"]["unaffected"] = make_list("15.0.0","14.1.2.3");


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");
}