Vulnerabilities > CVE-2017-17090 - Incomplete Cleanup vulnerability in Digium Asterisk and Certified Asterisk

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Debian Security Advisory DSA-4076. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(105498);
  script_version("3.5");
  script_cvs_date("Date: 2019/04/05 23:25:05");

  script_cve_id("CVE-2017-16671", "CVE-2017-16672", "CVE-2017-17090", "CVE-2017-17664");
  script_xref(name:"DSA", value:"4076");

  script_name(english:"Debian DSA-4076-1 : asterisk - 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:
"Multiple vulnerabilities have been discovered in Asterisk, an open
source PBX and telephony toolkit, which may result in denial of
service, information disclosure and potentially the execution of
arbitrary code."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/source-package/asterisk"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/jessie/asterisk"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/stretch/asterisk"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2017/dsa-4076"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the asterisk packages.

For the oldstable distribution (jessie), these problems have been
fixed in version 1:11.13.1~dfsg-2+deb8u5.

For the stable distribution (stretch), these problems have been fixed
in version 1:13.14.1~dfsg-2+deb9u3."
  );
  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:asterisk");
  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:"2017/12/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/01/02");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018-2019 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:"asterisk", reference:"1:11.13.1~dfsg-2+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"asterisk-config", reference:"1:11.13.1~dfsg-2+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"asterisk-dahdi", reference:"1:11.13.1~dfsg-2+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"asterisk-dbg", reference:"1:11.13.1~dfsg-2+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"asterisk-dev", reference:"1:11.13.1~dfsg-2+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"asterisk-doc", reference:"1:11.13.1~dfsg-2+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"asterisk-mobile", reference:"1:11.13.1~dfsg-2+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"asterisk-modules", reference:"1:11.13.1~dfsg-2+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"asterisk-mp3", reference:"1:11.13.1~dfsg-2+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"asterisk-mysql", reference:"1:11.13.1~dfsg-2+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"asterisk-ooh323", reference:"1:11.13.1~dfsg-2+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"asterisk-voicemail", reference:"1:11.13.1~dfsg-2+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"asterisk-voicemail-imapstorage", reference:"1:11.13.1~dfsg-2+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"asterisk-voicemail-odbcstorage", reference:"1:11.13.1~dfsg-2+deb8u5")) flag++;
if (deb_check(release:"8.0", prefix:"asterisk-vpb", reference:"1:11.13.1~dfsg-2+deb8u5")) flag++;
if (deb_check(release:"9.0", prefix:"asterisk", reference:"1:13.14.1~dfsg-2+deb9u3")) flag++;
if (deb_check(release:"9.0", prefix:"asterisk-config", reference:"1:13.14.1~dfsg-2+deb9u3")) flag++;
if (deb_check(release:"9.0", prefix:"asterisk-dahdi", reference:"1:13.14.1~dfsg-2+deb9u3")) flag++;
if (deb_check(release:"9.0", prefix:"asterisk-dev", reference:"1:13.14.1~dfsg-2+deb9u3")) flag++;
if (deb_check(release:"9.0", prefix:"asterisk-doc", reference:"1:13.14.1~dfsg-2+deb9u3")) flag++;
if (deb_check(release:"9.0", prefix:"asterisk-mobile", reference:"1:13.14.1~dfsg-2+deb9u3")) flag++;
if (deb_check(release:"9.0", prefix:"asterisk-modules", reference:"1:13.14.1~dfsg-2+deb9u3")) flag++;
if (deb_check(release:"9.0", prefix:"asterisk-mp3", reference:"1:13.14.1~dfsg-2+deb9u3")) flag++;
if (deb_check(release:"9.0", prefix:"asterisk-mysql", reference:"1:13.14.1~dfsg-2+deb9u3")) flag++;
if (deb_check(release:"9.0", prefix:"asterisk-ooh323", reference:"1:13.14.1~dfsg-2+deb9u3")) flag++;
if (deb_check(release:"9.0", prefix:"asterisk-voicemail", reference:"1:13.14.1~dfsg-2+deb9u3")) flag++;
if (deb_check(release:"9.0", prefix:"asterisk-voicemail-imapstorage", reference:"1:13.14.1~dfsg-2+deb9u3")) flag++;
if (deb_check(release:"9.0", prefix:"asterisk-voicemail-odbcstorage", reference:"1:13.14.1~dfsg-2+deb9u3")) flag++;
if (deb_check(release:"9.0", prefix:"asterisk-vpb", reference:"1:13.14.1~dfsg-2+deb9u3")) 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(105041);
  script_version("1.7");
  script_cvs_date("Date: 2019/11/12");

  script_cve_id("CVE-2017-17090");
  script_bugtraq_id(102023);

  script_name(english:"Asterisk 13.x < 13.18.3 / 14.x < 14.7.3 / 15.x < 15.1.3 / 13.13 < 13.13-cert8 Memory Exhaustion Remote DoS (AST-2017-013)");
  script_summary(english:"Checks the version in the SIP banner.");

  script_set_attribute(attribute:"synopsis", value:
"A telephony application running on the remote host is affected by
a memory exhaustion remote denial-of-service vulnerability.");
  script_set_attribute(attribute:"description", value:
"According to its SIP banner, the version of Asterisk running on the
remote host is 13.x prior to 13.18.3, 14.x prior to 14.7.3, 15.x prior
to 15.1.3, or 13.13 prior to 13.13-cert8. It is therefore, affected by
a memory exhaustion remote denial-of-service attack as described in
AST-2017-013.

Also note that Nessus has not tested for these issues but has instead
relied only on the application's self-reported version number.");
  script_set_attribute(attribute:"see_also", value:"http://downloads.asterisk.org/pub/security/AST-2017-013.html");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Asterisk version 13.18.3 / 14.7.3 / 15.1.3 / 13.13-cert8 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/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:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-17090");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/11/29");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/12/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/12/06");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:digium:asterisk");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

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

  script_dependencies("asterisk_detection.nasl");
  script_require_keys("asterisk/sip_detected", "Settings/ParanoidReport");

  exit(0);
}

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

get_kb_item_or_exit("asterisk/sip_detected");

asterisk_kbs = get_kb_list_or_exit("sip/asterisk/*/version");

if (report_paranoia < 2) audit(AUDIT_PARANOID);

is_vuln = FALSE;
not_vuln_installs = make_list();
errors = make_list();

foreach kb_name (keys(asterisk_kbs))
{
  vulnerable = 0;

  matches = pregmatch(pattern:"/(udp|tcp)/([0-9]+)/version", string:kb_name);
  if (isnull(matches))
  {
    errors = make_list(errors, "Unexpected error parsing port number from '"+kb_name+"'.");
    continue;
  }

  proto = matches[1];
  port  = matches[2];
  version = asterisk_kbs[kb_name];

  if (version == 'unknown')
  {
    errors = make_list(errors, "Unable to obtain version of installation on " + proto + "/" + port + ".");
    continue;
  }

  banner = get_kb_item("sip/asterisk/" + proto + "/" + port + "/source");
  if (!banner)
  {
    # We have version but banner is missing;
    # log error and use in version-check though.
    errors = make_list(errors, "KB item 'sip/asterisk/" + proto + "/" + port + "/source' is missing.");
    banner = 'unknown';
  }

  if (version =~ "^13([^0-9])" && "cert" >!< tolower(version))
  {
    fixed = "13.18.3";
    vulnerable = ver_compare(ver:version, fix:fixed, app:"asterisk");
  }
  else if (version =~ "^14([^0-9])" && "cert" >!< tolower(version))
  {
    fixed = "14.7.3";
    vulnerable = ver_compare(ver:version, fix:fixed, app:"asterisk");
  }
  else if (version =~ "^15([^0-9])" && "cert" >!< tolower(version))
  {
    fixed = "15.1.3";
    vulnerable = ver_compare(ver:version, fix:fixed, app:"asterisk");
  }
  else if (version =~ "^13\.13([^0-9])" && "cert" >< tolower(version))
  {
    fixed = "13.13-cert8";
    vulnerable = ver_compare(ver:version, fix:fixed, app:"asterisk");
  }

  if (vulnerable < 0)
  {
    is_vuln = TRUE;
    report =
        '\n  Version source    : ' + banner +
        '\n  Installed version : ' + version +
        '\n  Fixed version     : ' + fixed +
        '\n';
      security_report_v4(severity:SECURITY_WARNING, port:port, proto:proto, extra:report);
  }
  else not_vuln_installs = make_list(not_vuln_installs, version + " on port " + proto + "/" + port);
}

if (max_index(errors))
{
  if (max_index(errors) == 1) errmsg = errors[0];
  else errmsg = 'Errors were encountered verifying installations : \n  ' + join(errors, sep:'\n  ');

  exit(1, errmsg);
}
else
{
  installs = max_index(not_vuln_installs);
  if (installs == 0)
  {
    if (is_vuln) exit(0);
    else audit(AUDIT_NOT_INST, "Asterisk");
  }
  else audit(AUDIT_INST_VER_NOT_VULN, "Asterisk", not_vuln_installs);
}

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from the FreeBSD VuXML database :
#
# Copyright 2003-2018 Jacques Vidrine and contributors
#
# Redistribution and use in source (VuXML) and 'compiled' forms (SGML,
# HTML, PDF, PostScript, RTF and so forth) with or without modification,
# are permitted provided that the following conditions are met:
# 1. Redistributions of source code (VuXML) must retain the above
#    copyright notice, this list of conditions and the following
#    disclaimer as the first lines of this file unmodified.
# 2. Redistributions in compiled form (transformed to other DTDs,
#    published online in any format, converted to PDF, PostScript,
#    RTF and other formats) must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer
#    in the documentation and/or other materials provided with the
#    distribution.
# 
# THIS DOCUMENTATION IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
# OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
# OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS DOCUMENTATION,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#

include("compat.inc");

if (description)
{
  script_id(104985);
  script_version("3.9");
  script_cvs_date("Date: 2019/04/10 16:10:17");

  script_cve_id("CVE-2017-17090");

  script_name(english:"FreeBSD : asterisk -- DOS Vulnerability in Asterisk chan_skinny (e91cf90c-d6dd-11e7-9d10-001999f8d30b)");
  script_summary(english:"Checks for updated package in pkg_info output");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote FreeBSD host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"The Asterisk project reports :

If the chan_skinny (AKA SCCP protocol) channel driver is flooded with
certain requests it can cause the asterisk process to use excessive
amounts of virtual memory eventually causing asterisk to stop
processing requests of any kind."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://downloads.asterisk.org/pub/security/AST-2017-013.html"
  );
  # https://vuxml.freebsd.org/freebsd/e91cf90c-d6dd-11e7-9d10-001999f8d30b.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?177a6949"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/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:N/UI:N/S:U/C:N/I:N/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:freebsd:freebsd:asterisk13");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/11/30");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/12/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/12/04");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"FreeBSD Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/FreeBSD/release", "Host/FreeBSD/pkg_info");

  exit(0);
}


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


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/FreeBSD/release")) audit(AUDIT_OS_NOT, "FreeBSD");
if (!get_kb_item("Host/FreeBSD/pkg_info")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;

if (pkg_test(save_report:TRUE, pkg:"asterisk13<13.18.3")) flag++;

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