F5 BIG-IP - TMM vulnerability CVE-2017-6137

# SPDX-FileCopyrightText: 2017 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

CPE = "cpe:/h:f5:big-ip";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.107207");
  script_cve_id("CVE-2017-6137");
  script_tag(name:"cvss_base", value:"4.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:N/I:N/A:P");
  script_version("2026-04-24T06:23:04+0000");

  script_name("F5 BIG-IP - TMM vulnerability CVE-2017-6137");

  script_xref(name:"URL", value:"https://my.f5.com/manage/s/article/K82851041");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"solution", value:"See the referenced vendor advisory for a solution.");

  script_tag(name:"summary", value:"Undisclosed traffic patterns received while software SYN cookie protection is
  engaged may cause a disruption of service to the Traffic Management Microkernel (TMM) on specific platforms and
  configurations. (CVE-2017-6137)");

  script_tag(name:"impact", value:"When software syncookie protection is activated for a virtual server (the
  connection.syncookies.threshold database value has been exceeded), and the unit also has the Traffic Management
  Microkernel (TMM) fast forward enabled (the tmm.ffwd.enable database value is true, the default), and TCP
  Segmentation Offload (TSO) is enabled (the tm.tcpsegmentationoffload database value is true, the default) a
  specific sequence of packets causes TMM to generate an egress packet with an invalid MSS. As a result, packets
  egressing the BIG-IP system with an invalid MSS may be dropped by a neighboring device. Additionally, on the 3900,
  6900, 8900, 8950, 11000, and 11050 platforms this may cause the high-speed bridge (HSB) to lock up.");

  script_tag(name:"qod_type", value:"package");
  script_tag(name:"solution_type", value:"VendorFix");

  script_tag(name:"last_modification", value:"2026-04-24 06:23:04 +0000 (Fri, 24 Apr 2026)");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2019-10-03 00:03:00 +0000 (Thu, 03 Oct 2019)");
  script_tag(name:"creation_date", value:"2017-05-29 14:28:20 +0200 (Mon, 29 May 2017)");

  script_category(ACT_GATHER_INFO);
  script_family("F5 Local Security Checks");
  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_dependencies("gb_f5_big_ip_ssh_login_detect.nasl");
  script_mandatory_keys("f5/big_ip/version", "f5/big_ip/active_modules");

  exit(0);
}

include("f5.inc");
include("host_details.inc");
include("list_array_func.inc");
include("version_func.inc");

if (!version = get_app_version(cpe: CPE, service: "ssh-login"))
  exit(0);

check_f5["LTM"] = make_array("affected",   "12.1.0-12.1.2;12.0.0_HF3;12.0.0_HF4;11.6.1_HF1;",
                             "unaffected", "13.0.0;12.1.2_HF1;11.6.1_HF2;11.4.0-11.6.1;11.2.1;");

check_f5["AAM"] = make_array("affected",   "12.1.0-12.1.2;12.0.0_HF3;12.0.0_HF4;11.6.1_HF1;",
                             "unaffected", "13.0.0;12.1.2_HF1;11.6.1_HF2;11.4.0-11.6.1;");

check_f5["AFM"] = make_array("affected",   "12.1.0-12.1.2;12.0.0_HF3;12.0.0_HF4;11.6.1_HF1;",
                             "unaffected", "13.0.0;12.1.2_HF1;11.6.1_HF2;11.4.0-11.6.1;");

check_f5["AVR"] = make_array("affected",   "12.1.0-12.1.2;12.0.0_HF3;12.0.0_HF4;11.6.1_HF1;",
                             "unaffected", "13.0.0;12.1.2_HF1;11.6.1_HF2;11.4.0-11.6.1;11.2.1;");

check_f5["APM"] = make_array("affected",   "12.1.0-12.1.2;12.0.0_HF3;12.0.0_HF4;11.6.1_HF1;",
                             "unaffected", "13.0.0;12.1.2_HF1;11.6.1_HF2;11.4.0-11.6.1;11.2.1;");

check_f5["ASM"] = make_array("affected",   "12.1.0-12.1.2;12.0.0_HF3;12.0.0_HF4;11.6.1_HF1;",
                             "unaffected", "13.0.0;12.1.2_HF1;11.6.1_HF2;11.4.0-11.6.1;11.2.1;");

check_f5["LC"]  = make_array("affected",   "12.1.0-12.1.2;12.0.0_HF3;12.0.0_HF4;11.6.1_HF1;",
                             "unaffected", "13.0.0;12.1.2_HF1;11.6.1_HF2;11.4.0-11.6.1;11.2.1;");

check_f5["PEM"] = make_array("affected",   "12.1.0-12.1.2;12.0.0_HF3;12.0.0_HF4;11.6.1_HF1;",
                             "unaffected", "13.0.0;12.1.2_HF1;11.6.1_HF2;11.4.0-11.6.1;");

if (report = f5_is_vulnerable(ca: check_f5, version: version)) {
  security_message(port: 0, data: report);
  exit(0);
}

exit(99);