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nessusThis script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.F5_BIGIP_SOL09604370.NASL
HistoryMar 19, 2021 - 12:00 a.m.

F5 Networks BIG-IP : Linux kernel vulnerability (K09604370)

2021-03-1900:00:00
This script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
64

5.8 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:P/A:N

7.4 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

7.7 High

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

69.8%

A flaw in the way reply ICMP packets are limited in the Linux kernel functionality was found that allows to quickly scan open UDP ports.
This flaw allows an off-path remote user to effectively bypassing source port UDP randomization. The highest threat from this vulnerability is to confidentiality and possibly integrity, because software that relies on UDP source port randomization are indirectly affected as well. Kernel versions before 5.10 may be vulnerable to this issue. (CVE-2020-25705)

Impact

A remote off-path attacker can determine open User Datagram Protocol (UDP) source ports on a vulnerable system based on Internet Control Message Protocol (ICMP) error messages, making it possible to execute a ‘SAD DNS attack.’

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from F5 Networks BIG-IP Solution K09604370.
#
# The text description of this plugin is (C) F5 Networks.
#

include('compat.inc');

if (description)
{
  script_id(147905);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/09");

  script_cve_id("CVE-2020-25705");
  script_xref(name:"CEA-ID", value:"CEA-2020-0138");

  script_name(english:"F5 Networks BIG-IP : Linux kernel vulnerability (K09604370)");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch.");
  script_set_attribute(attribute:"description", value:
"A flaw in the way reply ICMP packets are limited in the Linux kernel
functionality was found that allows to quickly scan open UDP ports.
This flaw allows an off-path remote user to effectively bypassing
source port UDP randomization. The highest threat from this
vulnerability is to confidentiality and possibly integrity, because
software that relies on UDP source port randomization are indirectly
affected as well. Kernel versions before 5.10 may be vulnerable to
this issue. (CVE-2020-25705)

Impact

A remote off-path attacker can determine open User Datagram Protocol
(UDP) source ports on a vulnerable system based on Internet Control
Message Protocol (ICMP) error messages, making it possible to execute
a 'SAD DNS attack.'");
  script_set_attribute(attribute:"see_also", value:"https://my.f5.com/manage/s/article/K09604370");
  script_set_attribute(attribute:"solution", value:
"Upgrade to one of the non-vulnerable versions listed in the F5 Solution K09604370.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-25705");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/11/17");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/12/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/03/19");

  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_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:/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) 2021-2024 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", "Settings/ParanoidReport");

  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');

if (report_paranoia < 2) audit(AUDIT_PARANOID);

var sol = 'K09604370';
var vmatrix = {
  'AFM': {
    'affected': [
      '13.1.0-13.1.4','12.1.0-12.1.6','11.6.1-11.6.5'
    ],
    'unaffected': [
      '14.1.0','13.1.5'
    ],
  },
  'AM': {
    'affected': [
      '13.1.0-13.1.4','12.1.0-12.1.6','11.6.1-11.6.5'
    ],
    'unaffected': [
      '14.1.0','13.1.5'
    ],
  },
  'APM': {
    'affected': [
      '13.1.0-13.1.4','12.1.0-12.1.6','11.6.1-11.6.5'
    ],
    'unaffected': [
      '14.1.0','13.1.5'
    ],
  },
  'ASM': {
    'affected': [
      '13.1.0-13.1.4','12.1.0-12.1.6','11.6.1-11.6.5'
    ],
    'unaffected': [
      '14.1.0','13.1.5'
    ],
  },
  'AVR': {
    'affected': [
      '13.1.0-13.1.4','12.1.0-12.1.6','11.6.1-11.6.5'
    ],
    'unaffected': [
      '14.1.0','13.1.5'
    ],
  },
  'DNS': {
    'affected': [
      '13.1.0-13.1.4','12.1.0-12.1.6','11.6.1-11.6.5'
    ],
    'unaffected': [
      '14.1.0','13.1.5'
    ],
  },
  'GTM': {
    'affected': [
      '13.1.0-13.1.4','12.1.0-12.1.6','11.6.1-11.6.5'
    ],
    'unaffected': [
      '14.1.0','13.1.5'
    ],
  },
  'LC': {
    'affected': [
      '13.1.0-13.1.4','12.1.0-12.1.6','11.6.1-11.6.5'
    ],
    'unaffected': [
      '14.1.0','13.1.5'
    ],
  },
  'LTM': {
    'affected': [
      '13.1.0-13.1.4','12.1.0-12.1.6','11.6.1-11.6.5'
    ],
    'unaffected': [
      '14.1.0','13.1.5'
    ],
  },
  'PEM': {
    'affected': [
      '13.1.0-13.1.4','12.1.0-12.1.6','11.6.1-11.6.5'
    ],
    'unaffected': [
      '14.1.0','13.1.5'
    ],
  }
};

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');
}
VendorProductVersionCPE
f5big-ip_access_policy_managercpe:/a:f5:big-ip_access_policy_manager
f5big-ip_advanced_firewall_managercpe:/a:f5:big-ip_advanced_firewall_manager
f5big-ip_application_acceleration_managercpe:/a:f5:big-ip_application_acceleration_manager
f5big-ip_application_security_managercpe:/a:f5:big-ip_application_security_manager
f5big-ip_application_visibility_and_reportingcpe:/a:f5:big-ip_application_visibility_and_reporting
f5big-ip_domain_name_systemcpe:/a:f5:big-ip_domain_name_system
f5big-ip_global_traffic_managercpe:/a:f5:big-ip_global_traffic_manager
f5big-ip_link_controllercpe:/a:f5:big-ip_link_controller
f5big-ip_local_traffic_managercpe:/a:f5:big-ip_local_traffic_manager
f5big-ip_policy_enforcement_managercpe:/a:f5:big-ip_policy_enforcement_manager
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1-10 of 111

5.8 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:P/A:N

7.4 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

7.7 High

AI Score

Confidence

High

0.003 Low

EPSS

Percentile

69.8%