F5 Networks BIG-IP : Linux kernel TCP ISN vulnerability (K15301)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from F5 Networks BIG-IP Solution K15301.
#
# The text description of this plugin is (C) F5 Networks.
#

include("compat.inc");

if (description)
{
  script_id(78170);
  script_version("1.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/03/10");

  script_cve_id("CVE-2011-3188");
  script_bugtraq_id(49289);

  script_name(english:"F5 Networks BIG-IP : Linux kernel TCP ISN vulnerability (K15301)");
  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 (1) IPv4 and (2) IPv6 implementations in the Linux kernel before
3.1 use a modified MD4 algorithm to generate sequence numbers and
Fragment Identification values, which makes it easier for remote
attackers to cause a denial of service (disrupted networking) or
hijack network sessions by predicting these values and sending crafted
packets. (CVE-2011-3188)

Impact

Attackers may be able to cause denial-of-service (DoS) or hijack
network sessions by predicting sequence number values and sending
crafted packets.

This issue affects control-plane traffic generated by the Linux
kernel, and does not affect data-plane traffic.Outbound connections
initiated from the BIG-IP system by administrative applications such
as BIG-IP health monitors, SNMP, SMTP, SSH, network time protocol
(NTP), and so on, are processed by the Linux operating system, and may
be exploited by this vulnerability. For more information, refer to
K13284: Overview of management interface routing (11.x and later).

Note : Vulnerability scanners searching for this vulnerability will
sometimes return false positives, as they depend on a low entropy
value in certain sequence numbers for this vulnerability. Identifying
a low entropy value in these tests may be inherently prone to false
positives. For more information on vulnerability scanners, refer
toK31046057: CVE security vulnerability scanners may report false
positive results."
  );
  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/K15301"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://support.f5.com/csp/article/K31046057"
  );
  script_set_attribute(
    attribute:"solution",
    value:
"Upgrade to one of the non-vulnerable versions listed in the F5
Solution K15301."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:P");
  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:H/A:H");
  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_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_wan_optimization_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:"cpe", value:"cpe:/h:f5:big-ip_protocol_security_manager");

  script_set_attribute(attribute:"vuln_publication_date", value:"2012/05/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2014/07/25");
  script_set_attribute(attribute:"plugin_publication_date", value:"2014/10/10");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2014-2021 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 = "K15301";
vmatrix = make_array();

if (report_paranoia < 2) audit(AUDIT_PARANOID);

# APM
vmatrix["APM"] = make_array();
vmatrix["APM"]["affected"  ] = make_list("11.0.0-11.1.0","10.1.0-10.2.4");
vmatrix["APM"]["unaffected"] = make_list("11.2.0-11.6.0");

# ASM
vmatrix["ASM"] = make_array();
vmatrix["ASM"]["affected"  ] = make_list("11.0.0-11.1.0","10.0.0-10.2.4");
vmatrix["ASM"]["unaffected"] = make_list("11.2.0-11.6.0");

# AVR
vmatrix["AVR"] = make_array();
vmatrix["AVR"]["affected"  ] = make_list("11.0.0-11.1.0");
vmatrix["AVR"]["unaffected"] = make_list("11.2.0-11.6.0");

# GTM
vmatrix["GTM"] = make_array();
vmatrix["GTM"]["affected"  ] = make_list("11.0.0-11.1.0","10.0.0-10.2.4");
vmatrix["GTM"]["unaffected"] = make_list("11.2.0-11.6.0");

# LC
vmatrix["LC"] = make_array();
vmatrix["LC"]["affected"  ] = make_list("11.0.0-11.1.0","10.0.0-10.2.4");
vmatrix["LC"]["unaffected"] = make_list("11.2.0-11.6.0");

# LTM
vmatrix["LTM"] = make_array();
vmatrix["LTM"]["affected"  ] = make_list("11.0.0-11.1.0","10.0.0-10.2.4");
vmatrix["LTM"]["unaffected"] = make_list("11.2.0-11.6.0");

# PSM
vmatrix["PSM"] = make_array();
vmatrix["PSM"]["affected"  ] = make_list("11.0.0-11.1.0","10.0.0-10.2.4");
vmatrix["PSM"]["unaffected"] = make_list("11.2.0-11.4.1");

# WAM
vmatrix["WAM"] = make_array();
vmatrix["WAM"]["affected"  ] = make_list("11.0.0-11.1.0","10.0.0-10.2.4");
vmatrix["WAM"]["unaffected"] = make_list("11.2.0-11.3.0");

# WOM
vmatrix["WOM"] = make_array();
vmatrix["WOM"]["affected"  ] = make_list("11.0.0-11.1.0","10.0.0-10.2.4");
vmatrix["WOM"]["unaffected"] = make_list("11.2.0-11.3.0");


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");
}