Vulnerabilities > CVE-2019-6632 - Cryptographic Issues vulnerability in F5 products

047910
CVSS 2.1 - LOW
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
NONE
Availability impact
NONE
local
low complexity
f5
CWE-310
nessus
NVD
Published: 2019-07-03
Updated: 2021-07-21

Summary

On BIG-IP 14.1.0-14.1.0.5, 14.0.0-14.0.0.4, 13.0.0-13.1.1.4, and 12.1.0-12.1.4, under certain circumstances, attackers can decrypt configuration items that are encrypted because the vCMP configuration unit key is generated with insufficient randomness. The attack prerequisite is direct access to encrypted configuration and/or UCS files.

Vulnerable Configurations

Part Description Count
Application
F5
732

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Signature Spoofing by Key Recreation
    An attacker obtains an authoritative or reputable signer's private signature key by exploiting a cryptographic weakness in the signature algorithm or pseudorandom number generation and then uses this key to forge signatures from the original signer to mislead a victim into performing actions that benefit the attacker.

Nessus

NASL familyF5 Networks Local Security Checks
NASL idF5_BIGIP_SOL01413496.NASL
descriptionUnder certain circumstances, attackers can decrypt configuration items that are encrypted because the vCMP configuration unit key is generated with insufficient randomness. The attack prerequisite is direct access to encrypted configuration and/or UCS files. (CVE-2019-6632) Impact BIG-IP This vulnerability may allow an attacker to decrypt configuration and/or user configuration set (UCS) files that are encrypted. BIG-IQ, F5 iWorkflow, Enterprise Manager, ARX, LineRate, and Traffix SDC There is no impact; these F5 products are not affected by this vulnerability.
last seen2020-03-17
modified2019-07-02
plugin id126394
published2019-07-02
reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/126394
titleF5 Networks BIG-IP : vCMP vulnerability (K01413496)
code
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from F5 Networks BIG-IP Solution K01413496.
#
# The text description of this plugin is (C) F5 Networks.
#

include("compat.inc");

if (description)
{
  script_id(126394);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/09");

  script_cve_id("CVE-2019-6632");

  script_name(english:"F5 Networks BIG-IP : vCMP vulnerability (K01413496)");
  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:
"Under certain circumstances, attackers can decrypt configuration items
that are encrypted because the vCMP configuration unit key is
generated with insufficient randomness. The attack prerequisite is
direct access to encrypted configuration and/or UCS files.
(CVE-2019-6632)

Impact

BIG-IP

This vulnerability may allow an attacker to decrypt configuration
and/or user configuration set (UCS) files that are encrypted.

BIG-IQ, F5 iWorkflow, Enterprise Manager, ARX, LineRate, and Traffix
SDC

There is no impact; these F5 products are not affected by this
vulnerability."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://support.f5.com/csp/article/K01413496"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade to one of the non-vulnerable versions listed in the F5
Solution K01413496."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/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:L/PR:L/UI:N/S:U/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:"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:"2019/07/03");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/07/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/07/02");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2019-2020 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");

  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 = "K01413496";
vmatrix = make_array();

# AFM
vmatrix["AFM"] = make_array();
vmatrix["AFM"]["affected"  ] = make_list("14.1.0","14.0.0","13.0.0-13.1.1","12.1.0-12.1.4");
vmatrix["AFM"]["unaffected"] = make_list("15.0.0","14.1.0.6","14.0.0.5","13.1.1.5","12.1.4.1");

# AM
vmatrix["AM"] = make_array();
vmatrix["AM"]["affected"  ] = make_list("14.1.0","14.0.0","13.0.0-13.1.1","12.1.0-12.1.4");
vmatrix["AM"]["unaffected"] = make_list("15.0.0","14.1.0.6","14.0.0.5","13.1.1.5","12.1.4.1");

# APM
vmatrix["APM"] = make_array();
vmatrix["APM"]["affected"  ] = make_list("14.1.0","14.0.0","13.0.0-13.1.1","12.1.0-12.1.4");
vmatrix["APM"]["unaffected"] = make_list("15.0.0","14.1.0.6","14.0.0.5","13.1.1.5","12.1.4.1");

# ASM
vmatrix["ASM"] = make_array();
vmatrix["ASM"]["affected"  ] = make_list("14.1.0","14.0.0","13.0.0-13.1.1","12.1.0-12.1.4");
vmatrix["ASM"]["unaffected"] = make_list("15.0.0","14.1.0.6","14.0.0.5","13.1.1.5","12.1.4.1");

# AVR
vmatrix["AVR"] = make_array();
vmatrix["AVR"]["affected"  ] = make_list("14.1.0","14.0.0","13.0.0-13.1.1","12.1.0-12.1.4");
vmatrix["AVR"]["unaffected"] = make_list("15.0.0","14.1.0.6","14.0.0.5","13.1.1.5","12.1.4.1");

# GTM
vmatrix["GTM"] = make_array();
vmatrix["GTM"]["affected"  ] = make_list("14.1.0","14.0.0","13.0.0-13.1.1","12.1.0-12.1.4");
vmatrix["GTM"]["unaffected"] = make_list("15.0.0","14.1.0.6","14.0.0.5","13.1.1.5","12.1.4.1");

# LC
vmatrix["LC"] = make_array();
vmatrix["LC"]["affected"  ] = make_list("14.1.0","14.0.0","13.0.0-13.1.1","12.1.0-12.1.4");
vmatrix["LC"]["unaffected"] = make_list("15.0.0","14.1.0.6","14.0.0.5","13.1.1.5","12.1.4.1");

# LTM
vmatrix["LTM"] = make_array();
vmatrix["LTM"]["affected"  ] = make_list("14.1.0","14.0.0","13.0.0-13.1.1","12.1.0-12.1.4");
vmatrix["LTM"]["unaffected"] = make_list("15.0.0","14.1.0.6","14.0.0.5","13.1.1.5","12.1.4.1");

# PEM
vmatrix["PEM"] = make_array();
vmatrix["PEM"]["affected"  ] = make_list("14.1.0","14.0.0","13.0.0-13.1.1","12.1.0-12.1.4");
vmatrix["PEM"]["unaffected"] = make_list("15.0.0","14.1.0.6","14.0.0.5","13.1.1.5","12.1.4.1");

# WAM
vmatrix["WAM"] = make_array();
vmatrix["WAM"]["affected"  ] = make_list("14.1.0","14.0.0","13.0.0-13.1.1","12.1.0-12.1.4");
vmatrix["WAM"]["unaffected"] = make_list("15.0.0","14.1.0.6","14.0.0.5","13.1.1.5","12.1.4.1");


if (bigip_is_affected(vmatrix:vmatrix, sol:sol))
{
  if (report_verbosity > 0) security_note(port:0, extra:bigip_report_get());
  else security_note(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");
}

References