F5 BIG-IP - libXML2 vulnerabilities CVE-2015-7941 and CVE-2015-7942

# SPDX-FileCopyrightText: 2016 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("1.3.6.1.4.1.25623.1.0.105550");
  script_cve_id("CVE-2015-7941", "CVE-2015-7942");
  script_tag(name:"cvss_base", value:"6.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_version("2026-04-24T06:23:04+0000");

  script_name("F5 BIG-IP - libXML2 vulnerabilities CVE-2015-7941 and CVE-2015-7942");

  script_xref(name:"URL", value:"https://my.f5.com/manage/s/article/K61570943");

  script_tag(name:"impact", value:"CVE-2015-7941libxml2 2.9.2 does not properly stop parsing invalid input, which allows context-dependent attackers to cause a denial of service (out-of-bounds read and libxml2 crash) via crafted XML data to the (1) xmlParseEntityDecl or (2) xmlParseConditionalSections function in parser.c, as demonstrated by non-terminated entities.CVE-2015-7942The xmlParseConditionalSections function in parser.c in libxml2 does not properly skip intermediary entities when it stops parsing invalid input, which allows context-dependent attackers to cause a denial of service (out-of-bounds read and crash) via crafted XML data, a different vulnerability than CVE-2015-7941.");

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

  script_tag(name:"insight", value:"libxml2 2.9.2 does not properly stop parsing invalid input, which allows context-dependent attackers to cause a denial of service (out-of-bounds read and libxml2 crash) via crafted XML data to the (1) xmlParseEntityDecl or (2) xmlParseConditionalSections function in parser.c, as demonstrated by non-terminated entities.
The xmlParseConditionalSections function in parser.c in libxml2 does not properly skip intermediary entities when it stops parsing invalid input, which allows context-dependent attackers to cause a denial of service (out-of-bounds read and crash) via crafted XML data, a different vulnerability than CVE-2015-7941.");

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

  script_tag(name:"summary", value:"The remote host is missing a security patch.");

  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:"creation_date", value:"2016-02-16 16:25:25 +0100 (Tue, 16 Feb 2016)");
  script_category(ACT_GATHER_INFO);
  script_family("F5 Local Security Checks");
  script_copyright("Copyright (C) 2016 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",   "11.0.0-11.6.0;10.1.0-10.2.4;",
                             "unaffected", "12.0.0-12.1.0;");

check_f5["AAM"] = make_array("affected",   "11.4.0-11.6.0;",
                             "unaffected", "12.0.0-;12.1.0;");

check_f5["AFM"] = make_array("affected",   "11.3.0-11.6.0;",
                             "unaffected", "12.0.0-;12.1.0;");

check_f5["AVR"] = make_array("affected",   "11.0.0-11.6.0;",
                             "unaffected", "12.0.0-;12.1.0;");

check_f5["APM"] = make_array("affected",   "11.0.0-11.6.0;10.1.0-10.2.4;",
                             "unaffected", "12.0.0-;12.1.0;");

check_f5["ASM"] = make_array("affected",   "11.0.0-11.6.0;10.1.0-10.2.4;",
                             "unaffected", "12.0.0-;12.1.0;");

check_f5["LC"]  = make_array("affected",   "11.0.0-11.6.0;10.1.0-10.2.4;",
                             "unaffected", "12.0.0-;12.1.0;");

check_f5["PEM"] = make_array("affected",   "11.3.0-11.6.0;",
                             "unaffected", "12.0.0-;12.1.0;");

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

exit(99);