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nessusThis script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.F5_BIGIP_SOL46514822.NASL
HistoryAug 29, 2016 - 12:00 a.m.

F5 Networks BIG-IP : Linux TCP stack vulnerability (K46514822)

2016-08-2900:00:00
This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
68

CVSS2

5.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

4.8

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

LOW

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L

EPSS

0.004

Percentile

75.1%

net/ipv4/tcp_input.c in the Linux kernel before 4.7 does not properly determine the rate of challenge ACK segments, which makes it easier for man-in-the-middle attackers to hijack TCP sessions via a blind in-window attack. (CVE-2016-5696)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from F5 Networks BIG-IP Solution K46514822.
#
# The text description of this plugin is (C) F5 Networks.
#

include("compat.inc");

if (description)
{
  script_id(93136);
  script_version("2.9");
  script_cvs_date("Date: 2019/01/04 10:03:40");

  script_cve_id("CVE-2016-5696");

  script_name(english:"F5 Networks BIG-IP : Linux TCP stack vulnerability (K46514822)");
  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:
"net/ipv4/tcp_input.c in the Linux kernel before 4.7 does not properly
determine the rate of challenge ACK segments, which makes it easier
for man-in-the-middle attackers to hijack TCP sessions via a blind
in-window attack. (CVE-2016-5696)"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://support.f5.com/csp/#/article/K13284"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://support.f5.com/csp/article/K46514822"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade to one of the non-vulnerable versions listed in the F5
Solution K46514822."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:P/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:L/A:L");
  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:"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_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:"patch_publication_date", value:"2016/08/26");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/08/29");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2016-2019 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 = "K46514822";
vmatrix = make_array();

if (report_paranoia < 2) audit(AUDIT_PARANOID);

# AFM
vmatrix["AFM"] = make_array();
vmatrix["AFM"]["affected"  ] = make_list("12.0.0-12.1.1HF1");
vmatrix["AFM"]["unaffected"] = make_list("12.1.1HF2","11.4.0-11.6.1");

# AM
vmatrix["AM"] = make_array();
vmatrix["AM"]["affected"  ] = make_list("12.0.0-12.1.1HF1");
vmatrix["AM"]["unaffected"] = make_list("12.1.1HF2","11.4.0-11.6.1");

# APM
vmatrix["APM"] = make_array();
vmatrix["APM"]["affected"  ] = make_list("12.0.0-12.1.1HF1");
vmatrix["APM"]["unaffected"] = make_list("12.1.1HF2","11.4.0-11.6.1","11.2.1","10.2.1-10.2.4");

# ASM
vmatrix["ASM"] = make_array();
vmatrix["ASM"]["affected"  ] = make_list("12.0.0-12.1.1HF1");
vmatrix["ASM"]["unaffected"] = make_list("12.1.1HF2","11.4.0-11.6.1","11.2.1","10.2.1-10.2.4");

# AVR
vmatrix["AVR"] = make_array();
vmatrix["AVR"]["affected"  ] = make_list("12.0.0-12.1.1HF1");
vmatrix["AVR"]["unaffected"] = make_list("12.1.1HF2","11.4.0-11.6.1","11.2.1");

# LC
vmatrix["LC"] = make_array();
vmatrix["LC"]["affected"  ] = make_list("12.0.0-12.1.1HF1");
vmatrix["LC"]["unaffected"] = make_list("12.1.1HF2","11.4.0-11.6.1","11.2.1","10.2.1-10.2.4");

# LTM
vmatrix["LTM"] = make_array();
vmatrix["LTM"]["affected"  ] = make_list("12.0.0-12.1.1HF1");
vmatrix["LTM"]["unaffected"] = make_list("12.1.1HF2","11.4.0-11.6.1","11.2.1","10.2.1-10.2.4");

# PEM
vmatrix["PEM"] = make_array();
vmatrix["PEM"]["affected"  ] = make_list("12.0.0-12.1.1HF1");
vmatrix["PEM"]["unaffected"] = make_list("12.1.1HF2","11.4.0-11.6.1");


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");
}
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_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
f5big-ipcpe:/h:f5:big-ip

CVSS2

5.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

4.8

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

LOW

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L

EPSS

0.004

Percentile

75.1%