Apache Tomcat NIO HTTP connector Information Disclosure Vulnerability - Linux

# 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:/a:apache:tomcat";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.811701");
  script_version("2024-02-15T05:05:40+0000");
  script_cve_id("CVE-2016-8745");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:N/A:N");
  script_tag(name:"last_modification", value:"2024-02-15 05:05:40 +0000 (Thu, 15 Feb 2024)");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2019-04-15 16:30:00 +0000 (Mon, 15 Apr 2019)");
  script_tag(name:"creation_date", value:"2017-08-11 16:00:03 +0530 (Fri, 11 Aug 2017)");
  script_tag(name:"qod_type", value:"remote_banner_unreliable");
  script_name("Apache Tomcat NIO HTTP connector Information Disclosure Vulnerability - Linux");

  script_tag(name:"summary", value:"Apache Tomcat is prone to an information disclosure vulnerability.");

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

  script_tag(name:"insight", value:"The flaw exists due to error handling of the
  send file code for the NIO HTTP connector in Apache Tomcat resulting in the
  current Processor object being added to the Processor cache multiple times.
  This in turn means that the same Processor could be used for concurrent requests.
  Sharing a Processor can result in information leakage between requests including,
  not not limited to, session ID and the response body.");

  script_tag(name:"impact", value:"Successful exploitation will allow remote
  attackers to gain access to potentially sensitive information.");

  script_tag(name:"affected", value:"Apache Tomcat versions 9.0.0.M1 to 9.0.0.M13,
  Apache Tomcat versions 8.5.0 to 8.5.8,
  Apache Tomcat versions 8.0.0.RC1 to 8.0.39,
  Apache Tomcat versions 7.0.0 to 7.0.73, and
  Apache Tomcat versions 6.0.16 to 6.0.48 on Linux.");

  script_tag(name:"solution", value:"Upgrade to Apache Tomcat version 9.0.0.M15
  or 8.5.9 or 8.0.41 or 7.0.75 or 6.0.50 or later.");

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

  script_xref(name:"URL", value:"https://bz.apache.org/bugzilla/show_bug.cgi?id=60409");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/94828");
  script_xref(name:"URL", value:"http://tomcat.apache.org/security-9.html#Fixed_in_Apache_Tomcat_9.0.0.M15");
  script_xref(name:"URL", value:"http://tomcat.apache.org/security-8.html#Fixed_in_Apache_Tomcat_8.0.41");
  script_xref(name:"URL", value:"http://tomcat.apache.org/security-7.html#Fixed_in_Apache_Tomcat_7.0.75");
  script_xref(name:"URL", value:"http://tomcat.apache.org/security-8.html#Fixed_in_Apache_Tomcat_8.5.9");
  script_xref(name:"URL", value:"http://tomcat.apache.org/security-6.html#Fixed_in_Apache_Tomcat_6.0.50");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_family("Web Servers");
  script_dependencies("gb_apache_tomcat_consolidation.nasl", "os_detection.nasl");
  script_mandatory_keys("apache/tomcat/detected", "Host/runs_unixoide");
  exit(0);
}

include("host_details.inc");
include("revisions-lib.inc");
include("version_func.inc");

if(isnull(tomPort = get_app_port(cpe:CPE)))
  exit(0);

if(!infos = get_app_version_and_location(cpe:CPE, port:tomPort, exit_no_version:TRUE))
  exit(0);

appVer = infos["version"];
path = infos["location"];

if(appVer =~ "^6\.")
{
  if((revcomp(a: appVer, b: "6.0.50") < 0) &&
     (revcomp(a: appVer, b: "6.0.16") >= 0)){
    fix = "6.0.50";
  }
}

else if(appVer =~ "^7\.")
{
  if(revcomp(a: appVer, b: "7.0.75") < 0){
    fix = "7.0.75";
  }
}

else if(appVer =~ "^8\.5\.")
{
  if(revcomp(a: appVer, b: "8.5.9") < 0){
    fix = "8.5.9";
  }
}

else if(appVer =~ "^8\.")
{
  if(revcomp(a: appVer, b: "8.0.41") < 0){
    fix = "8.0.41";
  }
}

else if(appVer =~ "^9\.")
{
  if(revcomp(a: appVer, b: "9.0.0.M15") < 0){
    fix = "9.0.0.M15";
  }
}

if(fix)
{
  report = report_fixed_ver(installed_version:appVer, fixed_version:fix, install_path:path);
  security_message(data:report, port:tomPort);
  exit(0);
}
exit(0);