Vulnerabilities > CVE-2017-17046 - Information Exposure vulnerability in XEN

047910
CVSS 6.5 - MEDIUM
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
LOW
Confidentiality impact
HIGH
Integrity impact
NONE
Availability impact
NONE
local
low complexity
xen
CWE-200
nessus
NVD
Published: 2017-11-28
Updated: 2018-10-19

Summary

An issue was discovered in Xen through 4.9.x on the ARM platform allowing guest OS users to obtain sensitive information from DRAM after a reboot, because disjoint blocks, and physical addresses that do not start at zero, are mishandled.

Vulnerable Configurations

Part Description Count
OS
Xen
239

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Subverting Environment Variable Values
    The attacker directly or indirectly modifies environment variables used by or controlling the target software. The attacker's goal is to cause the target software to deviate from its expected operation in a manner that benefits the attacker.
  • Footprinting
    An attacker engages in probing and exploration activity to identify constituents and properties of the target. Footprinting is a general term to describe a variety of information gathering techniques, often used by attackers in preparation for some attack. It consists of using tools to learn as much as possible about the composition, configuration, and security mechanisms of the targeted application, system or network. Information that might be collected during a footprinting effort could include open ports, applications and their versions, network topology, and similar information. While footprinting is not intended to be damaging (although certain activities, such as network scans, can sometimes cause disruptions to vulnerable applications inadvertently) it may often pave the way for more damaging attacks.
  • Exploiting Trust in Client (aka Make the Client Invisible)
    An attack of this type exploits a programs' vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by placing themselves in the communication channel between client and server such that communication directly to the server is possible where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.
  • Browser Fingerprinting
    An attacker carefully crafts small snippets of Java Script to efficiently detect the type of browser the potential victim is using. Many web-based attacks need prior knowledge of the web browser including the version of browser to ensure successful exploitation of a vulnerability. Having this knowledge allows an attacker to target the victim with attacks that specifically exploit known or zero day weaknesses in the type and version of the browser used by the victim. Automating this process via Java Script as a part of the same delivery system used to exploit the browser is considered more efficient as the attacker can supply a browser fingerprinting method and integrate it with exploit code, all contained in Java Script and in response to the same web page request by the browser.
  • Session Credential Falsification through Prediction
    This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking.

Nessus

  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-201801-14.NASL
    descriptionThe remote host is affected by the vulnerability described in GLSA-201801-14 (Xen: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in Xen. Please review the referenced CVE identifiers for details. Impact : A local attacker could potentially execute arbitrary code with the privileges of the Xen (QEMU) process on the host, gain privileges on the host system, or cause a Denial of Service condition. Workaround : There is no known workaround at this time.
    last seen2020-06-01
    modified2020-06-02
    plugin id106038
    published2018-01-15
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/106038
    titleGLSA-201801-14 : Xen: Multiple vulnerabilities
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 201801-14.
#
# The advisory text is Copyright (C) 2001-2018 Gentoo Foundation, Inc.
# and licensed under the Creative Commons - Attribution / Share Alike 
# license. See http://creativecommons.org/licenses/by-sa/3.0/
#

include("compat.inc");

if (description)
{
  script_id(106038);
  script_version("1.3");
  script_cvs_date("Date: 2019/04/05 23:25:06");

  script_cve_id("CVE-2017-12134", "CVE-2017-12135", "CVE-2017-12136", "CVE-2017-12137", "CVE-2017-15588", "CVE-2017-15589", "CVE-2017-15590", "CVE-2017-15591", "CVE-2017-15592", "CVE-2017-15593", "CVE-2017-15594", "CVE-2017-15595", "CVE-2017-17044", "CVE-2017-17045", "CVE-2017-17046", "CVE-2017-17563", "CVE-2017-17564", "CVE-2017-17565", "CVE-2017-17566");
  script_xref(name:"GLSA", value:"201801-14");

  script_name(english:"GLSA-201801-14 : Xen: Multiple vulnerabilities");
  script_summary(english:"Checks for updated package(s) in /var/db/pkg");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Gentoo host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"The remote host is affected by the vulnerability described in GLSA-201801-14
(Xen: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in Xen. Please review the
      referenced CVE identifiers for details.
  
Impact :

    A local attacker could potentially execute arbitrary code with the
      privileges of the Xen (QEMU) process on the host, gain privileges on the
      host system, or cause a Denial of Service condition.
  
Workaround :

    There is no known workaround at this time."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/201801-14"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"All Xen users should upgrade to the latest version:
      # emerge --sync
      # emerge --ask --oneshot --verbose '>=app-emulation/xen-4.9.1-r1'
    All Xen tools users should upgrade to the latest version:
      # emerge --sync
      # emerge --ask --oneshot --verbose
      '>=app-emulation/xen-tools-4.9.1-r1'"
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/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:gentoo:linux:xen");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:xen-tools");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");

  script_set_attribute(attribute:"patch_publication_date", value:"2018/01/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/01/15");
  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:"Gentoo Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list");

  exit(0);
}


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

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo");
if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;

if (qpkg_check(package:"app-emulation/xen", unaffected:make_list("ge 4.9.1-r1"), vulnerable:make_list("lt 4.9.1-r1"))) flag++;
if (qpkg_check(package:"app-emulation/xen-tools", unaffected:make_list("ge 4.9.1-r1"), vulnerable:make_list("lt 4.9.1-r1"))) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:qpkg_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = qpkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "Xen");
}
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-4050.NASL
    descriptionMultiple vulnerabilities have been discovered in the Xen hypervisor, which could result in denial of service, information leaks, privilege escalation or the execution of arbitrary code.
    last seen2020-06-01
    modified2020-06-02
    plugin id104819
    published2017-11-29
    reporterThis script is Copyright (C) 2017-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/104819
    titleDebian DSA-4050-1 : xen - security update
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Debian Security Advisory DSA-4050. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(104819);
  script_version("3.7");
  script_cvs_date("Date: 2018/11/13 12:30:46");

  script_cve_id("CVE-2017-14316", "CVE-2017-14317", "CVE-2017-14318", "CVE-2017-14319", "CVE-2017-15588", "CVE-2017-15589", "CVE-2017-15590", "CVE-2017-15592", "CVE-2017-15593", "CVE-2017-15594", "CVE-2017-15595", "CVE-2017-15597", "CVE-2017-17044", "CVE-2017-17045", "CVE-2017-17046");
  script_xref(name:"DSA", value:"4050");

  script_name(english:"Debian DSA-4050-1 : xen - 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 the Xen hypervisor,
which could result in denial of service, information leaks, privilege
escalation or the execution of arbitrary code."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/source-package/xen"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/stretch/xen"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2017/dsa-4050"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the xen packages.

For the oldstable distribution (jessie) a separate update will be
released.

For the stable distribution (stretch), these problems have been fixed
in version 4.8.2+xsa245-0+deb9u1."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C");
  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:H/UI:N/S:C/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:xen");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2017/11/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/11/29");
  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:"9.0", prefix:"libxen-4.8", reference:"4.8.2+xsa245-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libxen-dev", reference:"4.8.2+xsa245-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"libxenstore3.0", reference:"4.8.2+xsa245-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"xen-hypervisor-4.8-amd64", reference:"4.8.2+xsa245-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"xen-hypervisor-4.8-arm64", reference:"4.8.2+xsa245-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"xen-hypervisor-4.8-armhf", reference:"4.8.2+xsa245-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"xen-system-amd64", reference:"4.8.2+xsa245-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"xen-system-arm64", reference:"4.8.2+xsa245-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"xen-system-armhf", reference:"4.8.2+xsa245-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"xen-utils-4.8", reference:"4.8.2+xsa245-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"xen-utils-common", reference:"4.8.2+xsa245-0+deb9u1")) flag++;
if (deb_check(release:"9.0", prefix:"xenstore-utils", reference:"4.8.2+xsa245-0+deb9u1")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DLA-1549.NASL
    descriptionMultiple vulnerabilities have been discovered in the Xen hypervisor, which could result in denial of service, informations leaks or privilege escalation. For Debian 8
    last seen2020-06-01
    modified2020-06-02
    plugin id118215
    published2018-10-19
    reporterThis script is Copyright (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/118215
    titleDebian DLA-1549-1 : xen security update
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-1549-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(118215);
  script_version("1.1");
  script_cvs_date("Date: 2018/10/19  9:33:03");

  script_cve_id("CVE-2017-14316", "CVE-2017-14317", "CVE-2017-14319", "CVE-2017-15588", "CVE-2017-15589", "CVE-2017-15590", "CVE-2017-15597", "CVE-2017-17046", "CVE-2017-17563", "CVE-2017-17564", "CVE-2017-17565", "CVE-2017-17566", "CVE-2018-10471", "CVE-2018-10982");

  script_name(english:"Debian DLA-1549-1 : xen 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:
"Multiple vulnerabilities have been discovered in the Xen hypervisor,
which could result in denial of service, informations leaks or
privilege escalation.

For Debian 8 'Jessie', these problems have been fixed in version
4.4.4lts2-0+deb8u1.

We recommend that you upgrade your xen 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/2018/10/msg00009.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/jessie/xen"
  );
  script_set_attribute(attribute:"solution", value:"Upgrade the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/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:libxen-4.4");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libxen-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libxenstore3.0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xen-hypervisor-4.4-amd64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xen-hypervisor-4.4-arm64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xen-hypervisor-4.4-armhf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xen-system-amd64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xen-system-arm64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xen-system-armhf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xen-utils-4.4");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xen-utils-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:xenstore-utils");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2018/10/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/10/19");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 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:"libxen-4.4", reference:"4.4.4lts2-0+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libxen-dev", reference:"4.4.4lts2-0+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libxenstore3.0", reference:"4.4.4lts2-0+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"xen-hypervisor-4.4-amd64", reference:"4.4.4lts2-0+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"xen-hypervisor-4.4-arm64", reference:"4.4.4lts2-0+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"xen-hypervisor-4.4-armhf", reference:"4.4.4lts2-0+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"xen-system-amd64", reference:"4.4.4lts2-0+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"xen-system-arm64", reference:"4.4.4lts2-0+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"xen-system-armhf", reference:"4.4.4lts2-0+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"xen-utils-4.4", reference:"4.4.4lts2-0+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"xen-utils-common", reference:"4.4.4lts2-0+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"xenstore-utils", reference:"4.4.4lts2-0+deb8u1")) flag++;

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

References