Vulnerabilities > CVE-2017-14635 - Improper Input Validation vulnerability in Otrs

#%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-1119-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(103577);
  script_version("3.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12");

  script_cve_id("CVE-2014-1695", "CVE-2014-2553", "CVE-2014-2554", "CVE-2017-14635");
  script_bugtraq_id(65844, 66567, 66569);

  script_name(english:"Debian DLA-1119-1 : otrs2 security update");
  script_summary(english:"Checks dpkg output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"An attacker who is logged into OTRS, a Ticket Request System, as an
agent with write permissions for statistics can inject arbitrary code
into the system. This can lead to serious problems like privilege
escalation, data loss, and denial of service. This issue is also known
as CVE-2017-14635 and is resolved by upgrading to the latest upstream
release of OTRS3.

****IMPORTANT UPGRADE NOTES**** ===============================

This update requires manual intervention. We strongly recommend to
backup all files and databases before upgrading. If you use the MySQL
backend you should read Debian bug report #707075 and the included
README.Debian file which will provide further information.

If you discover that the maintenance mode is still activated after the
update, we recommend to remove /etc/otrs/maintenance.html and
/var/lib/otrs/httpd/htdocs/maintenance.html which will resolve the
issue .

In addition the following security vulnerabilities were also 
addressed :

CVE-2014-1695 Cross-site scripting (XSS) vulnerability in OTRS allows
remote attackers to inject arbitrary web script or HTML via a crafted
HTML email

CVE-2014-2553 Cross-site scripting (XSS) vulnerability in OTRS allows
remote authenticated users to inject arbitrary web script or HTML via
vectors related to dynamic fields

CVE-2014-2554 OTRS allows remote attackers to conduct clickjacking
attacks via an IFRAME element

For Debian 7 'Wheezy', these problems have been fixed in version
3.3.18-1~deb7u1.

We recommend that you upgrade your otrs2 packages.

NOTE: Tenable Network Security has extracted the preceding description
block directly from the DLA security advisory. Tenable has attempted
to automatically clean and format it as much as possible without
introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://lists.debian.org/debian-lts-announce/2017/09/msg00036.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/wheezy/otrs2"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Upgrade the affected otrs, and otrs2 packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:otrs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:otrs2");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2017/09/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/10/02");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"7.0", prefix:"otrs", reference:"3.3.18-1~deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"otrs2", reference:"3.3.18-1~deb7u1")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Debian Security Advisory DSA-4021. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(104441);
  script_version("3.3");
  script_cvs_date("Date: 2018/11/10 11:49:38");

  script_cve_id("CVE-2017-14635");
  script_xref(name:"DSA", value:"4021");

  script_name(english:"Debian DSA-4021-1 : otrs2 - security update");
  script_summary(english:"Checks dpkg output for the updated package");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"It was discovered that missing input validation in the Open Ticket
Request System could result in privilege escalation by an agent with
write permissions for statistics."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/jessie/otrs2"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/stretch/otrs2"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2017/dsa-4021"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the otrs2 packages.

For the oldstable distribution (jessie), this problem has been fixed
in version 3.3.18-1+deb8u1.

For the stable distribution (stretch), this problem has been fixed in
version 5.0.16-1+deb9u2."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:otrs2");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2017/11/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/11/08");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2018 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"8.0", prefix:"otrs", reference:"3.3.18-1+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"otrs2", reference:"3.3.18-1+deb8u1")) flag++;
if (deb_check(release:"9.0", prefix:"otrs", reference:"5.0.16-1+deb9u2")) flag++;
if (deb_check(release:"9.0", prefix:"otrs2", reference:"5.0.16-1+deb9u2")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");

#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(105155);
  script_version("1.4");
  script_cvs_date("Date: 2019/11/12");

  script_cve_id("CVE-2017-14635");

  script_name(english:"OTRS Unspecified Remote Code Execution (OSA-2017-04)");
  script_summary(english:"Checks the product version.");

  script_set_attribute(attribute:"synopsis", value:
"A service management application running on the remote host is affected by
a remote code execution vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of OTRS running on the remote host is 3.3.x prior to 
3.3.18, 4.0.x prior to 4.0.25, 5.0.x prior to 5.0.23 or 6.0.x prior
to 6.0.beta2. It is, therefore, affected by a remote code execution 
vulnerability.");
  # https://www.otrs.com/security-advisory-2017-04-security-update-otrs-versions/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b75d8fec");
  script_set_attribute(attribute:"solution", value:
"Upgrade to OTRS version 3.3.18 / 4.0.25 / 5.0.23 / 6.0.beta2 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:P/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:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-14635");

  script_set_attribute(attribute:"exploitability_ease", value:"No exploit is required");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/09/19");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/09/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/12/11");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:otrs:otrs");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CGI abuses");

  script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("otrs_detect.nbin");
  script_require_ports("Services/www", 80, 443);

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("http.inc");
include("vcf.inc");

port = get_http_port(default:80);
app = vcf::get_app_info(app:"OTRS Web", webapp:TRUE, port:port);
if (app.version !~ "^3\.3" && app.version !~ "^[456]\.0") 
  audit(AUDIT_UNKNOWN_WEB_APP_VER, app.app, build_url(port:app.port, qs:app.path));

constraints = 
[
  {"min_version" : "3.3.0", "fixed_version" : "3.3.18"},
  {"min_version" : "4.0.0", "fixed_version" : "4.0.25"},
  {"min_version" : "5.0.0", "fixed_version" : "5.0.23"},
  {"min_version" : "6.0.0.beta1", "fixed_version" : "6.0.0.beta2"}
];

vcf::check_version_and_report(app_info:app, constraints:constraints, severity:SECURITY_WARNING, strict:FALSE);