Vulnerabilities > CVE-2016-2147 - Integer Overflow or Wraparound vulnerability in multiple products

047910
CVSS 5.0 - MEDIUM
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
PARTIAL
network
low complexity
busybox
debian
canonical
CWE-190
nessus

Summary

Integer overflow in the DHCP client (udhcpc) in BusyBox before 1.25.0 allows remote attackers to cause a denial of service (crash) via a malformed RFC1035-encoded domain name, which triggers an out-of-bounds heap write.

Vulnerable Configurations

Part Description Count
Application
Busybox
133
OS
Debian
2
OS
Canonical
4

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Forced Integer Overflow
    This attack forces an integer variable to go out of range. The integer variable is often used as an offset such as size of memory allocation or similarly. The attacker would typically control the value of such variable and try to get it out of range. For instance the integer in question is incremented past the maximum possible value, it may wrap to become a very small, or negative number, therefore providing a very incorrect value which can lead to unexpected behavior. At worst the attacker can execute arbitrary code.

Nessus

  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-201612-04.NASL
    descriptionThe remote host is affected by the vulnerability described in GLSA-201612-04 (BusyBox: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in BusyBox. Please review the CVE identifiers referenced below for details. Impact : A remote attacker could possibly execute arbitrary code with the privileges of the process, or cause a Denial of Service condition. Workaround : There is no known workaround at this time. However, on Gentoo, the remote code execution vulnerability can be avoided if you don’t use BusyBox’s udhcpc or build the package without the “ipv6” USE flag enabled.
    last seen2020-06-01
    modified2020-06-02
    plugin id95519
    published2016-12-05
    reporterThis script is Copyright (C) 2016-2017 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/95519
    titleGLSA-201612-04 : BusyBox: 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 201612-04.
    #
    # The advisory text is Copyright (C) 2001-2017 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(95519);
      script_version("$Revision: 3.3 $");
      script_cvs_date("$Date: 2017/02/21 14:37:42 $");
    
      script_cve_id("CVE-2016-2147", "CVE-2016-2148");
      script_xref(name:"GLSA", value:"201612-04");
    
      script_name(english:"GLSA-201612-04 : BusyBox: 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-201612-04
    (BusyBox: Multiple vulnerabilities)
    
        Multiple vulnerabilities have been discovered in BusyBox. Please review
          the CVE identifiers referenced below for details.
      
    Impact :
    
        A remote attacker could possibly execute arbitrary code with the
          privileges of the process, or cause a Denial of Service condition.
      
    Workaround :
    
        There is no known workaround at this time. However, on Gentoo, the
          remote code execution vulnerability can be avoided if you don’t use
          BusyBox’s udhcpc or build the package without the “ipv6” USE flag
          enabled."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://security.gentoo.org/glsa/201612-04"
      );
      script_set_attribute(
        attribute:"solution", 
        value:
    "All BusyBox users should upgrade to the latest version:
          # emerge --sync
          # emerge --ask --oneshot --verbose '>=sys-apps/busybox-1.24.2'"
      );
      script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
      script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/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:gentoo:linux:busybox");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");
    
      script_set_attribute(attribute:"patch_publication_date", value:"2016/12/04");
      script_set_attribute(attribute:"plugin_publication_date", value:"2016/12/05");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2016-2017 Tenable Network Security, Inc.");
      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:"sys-apps/busybox", unaffected:make_list("ge 1.24.2"), vulnerable:make_list("lt 1.24.2"))) 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, "BusyBox");
    }
    
  • NASL familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-3935-1.NASL
    descriptionTyler Hicks discovered that BusyBox incorrectly handled symlinks inside tar archives. If a user or automated system were tricked into processing a specially crafted tar archive, a remote attacker could overwrite arbitrary files outside of the current directory. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2011-5325) Mathias Krause discovered that BusyBox incorrectly handled kernel module loading restrictions. A local attacker could possibly use this issue to bypass intended restrictions. This issue only affected Ubuntu 14.04 LTS. (CVE-2014-9645) It was discovered that BusyBox incorrectly handled certain ZIP archives. If a user or automated system were tricked into processing a specially crafted ZIP archive, a remote attacker could cause BusyBox to crash, leading to a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2015-9261) Nico Golde discovered that the BusyBox DHCP client incorrectly handled certain malformed domain names. A remote attacker could possibly use this issue to cause the DHCP client to crash, leading to a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-2147) Nico Golde discovered that the BusyBox DHCP client incorrectly handled certain 6RD options. A remote attacker could use this issue to cause the DHCP client to crash, leading to a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-2148) It was discovered that BusyBox incorrectly handled certain bzip2 archives. If a user or automated system were tricked into processing a specially crafted bzip2 archive, a remote attacker could cause BusyBox to crash, leading to a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2017-15873) It was discovered that BusyBox incorrectly handled tab completion. A local attacker could possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2017-16544) It was discovered that the BusyBox wget utility incorrectly handled certain responses. A remote attacker could use this issue to cause BusyBox to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2018-1000517) It was discovered that the BusyBox DHCP utilities incorrectly handled certain memory operations. A remote attacker could possibly use this issue to access sensitive information. (CVE-2018-20679, CVE-2019-5747). Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id123751
    published2019-04-04
    reporterUbuntu Security Notice (C) 2019 Canonical, Inc. / NASL script (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/123751
    titleUbuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 18.10 : busybox vulnerabilities (USN-3935-1)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from Ubuntu Security Notice USN-3935-1. The text 
    # itself is copyright (C) Canonical, Inc. See 
    # <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
    # trademark of Canonical, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(123751);
      script_version("1.3");
      script_cvs_date("Date: 2019/09/18 12:31:49");
    
      script_cve_id("CVE-2011-5325", "CVE-2014-9645", "CVE-2015-9261", "CVE-2016-2147", "CVE-2016-2148", "CVE-2017-15873", "CVE-2017-16544", "CVE-2018-1000517", "CVE-2018-20679", "CVE-2019-5747");
      script_xref(name:"USN", value:"3935-1");
    
      script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 18.10 : busybox vulnerabilities (USN-3935-1)");
      script_summary(english:"Checks dpkg output for updated packages.");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:
    "The remote Ubuntu host is missing one or more security-related
    patches."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "Tyler Hicks discovered that BusyBox incorrectly handled symlinks
    inside tar archives. If a user or automated system were tricked into
    processing a specially crafted tar archive, a remote attacker could
    overwrite arbitrary files outside of the current directory. This issue
    only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2011-5325)
    
    Mathias Krause discovered that BusyBox incorrectly handled kernel
    module loading restrictions. A local attacker could possibly use this
    issue to bypass intended restrictions. This issue only affected Ubuntu
    14.04 LTS. (CVE-2014-9645)
    
    It was discovered that BusyBox incorrectly handled certain ZIP
    archives. If a user or automated system were tricked into processing a
    specially crafted ZIP archive, a remote attacker could cause BusyBox
    to crash, leading to a denial of service. This issue only affected
    Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2015-9261)
    
    Nico Golde discovered that the BusyBox DHCP client incorrectly handled
    certain malformed domain names. A remote attacker could possibly use
    this issue to cause the DHCP client to crash, leading to a denial of
    service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04
    LTS. (CVE-2016-2147)
    
    Nico Golde discovered that the BusyBox DHCP client incorrectly handled
    certain 6RD options. A remote attacker could use this issue to cause
    the DHCP client to crash, leading to a denial of service, or possibly
    execute arbitrary code. This issue only affected Ubuntu 14.04 LTS and
    Ubuntu 16.04 LTS. (CVE-2016-2148)
    
    It was discovered that BusyBox incorrectly handled certain bzip2
    archives. If a user or automated system were tricked into processing a
    specially crafted bzip2 archive, a remote attacker could cause BusyBox
    to crash, leading to a denial of service, or possibly execute
    arbitrary code. This issue only affected Ubuntu 14.04 LTS and Ubuntu
    16.04 LTS. (CVE-2017-15873)
    
    It was discovered that BusyBox incorrectly handled tab completion. A
    local attacker could possibly use this issue to execute arbitrary
    code. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS.
    (CVE-2017-16544)
    
    It was discovered that the BusyBox wget utility incorrectly handled
    certain responses. A remote attacker could use this issue to cause
    BusyBox to crash, resulting in a denial of service, or possibly
    execute arbitrary code. (CVE-2018-1000517)
    
    It was discovered that the BusyBox DHCP utilities incorrectly handled
    certain memory operations. A remote attacker could possibly use this
    issue to access sensitive information. (CVE-2018-20679, CVE-2019-5747).
    
    Note that Tenable Network Security has extracted the preceding
    description block directly from the Ubuntu 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://usn.ubuntu.com/3935-1/"
      );
      script_set_attribute(attribute:"solution", value:"Update the affected packages.");
      script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/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:N/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:canonical:ubuntu_linux:busybox");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:busybox-initramfs");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:busybox-static");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:udhcpc");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:udhcpd");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.10");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2017/02/09");
      script_set_attribute(attribute:"patch_publication_date", value:"2019/04/03");
      script_set_attribute(attribute:"plugin_publication_date", value:"2019/04/04");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"Ubuntu Security Notice (C) 2019 Canonical, Inc. / NASL script (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
      script_family(english:"Ubuntu Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("ubuntu.inc");
    include("misc_func.inc");
    
    if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    release = get_kb_item("Host/Ubuntu/release");
    if ( isnull(release) ) audit(AUDIT_OS_NOT, "Ubuntu");
    release = chomp(release);
    if (! preg(pattern:"^(14\.04|16\.04|18\.04|18\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 14.04 / 16.04 / 18.04 / 18.10", "Ubuntu " + release);
    if ( ! get_kb_item("Host/Debian/dpkg-l") ) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    cpu = get_kb_item("Host/cpu");
    if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
    if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Ubuntu", cpu);
    
    flag = 0;
    
    if (ubuntu_check(osver:"14.04", pkgname:"busybox", pkgver:"1:1.21.0-1ubuntu1.4")) flag++;
    if (ubuntu_check(osver:"14.04", pkgname:"busybox-initramfs", pkgver:"1:1.21.0-1ubuntu1.4")) flag++;
    if (ubuntu_check(osver:"14.04", pkgname:"busybox-static", pkgver:"1:1.21.0-1ubuntu1.4")) flag++;
    if (ubuntu_check(osver:"14.04", pkgname:"udhcpc", pkgver:"1:1.21.0-1ubuntu1.4")) flag++;
    if (ubuntu_check(osver:"14.04", pkgname:"udhcpd", pkgver:"1:1.21.0-1ubuntu1.4")) flag++;
    if (ubuntu_check(osver:"16.04", pkgname:"busybox", pkgver:"1:1.22.0-15ubuntu1.4")) flag++;
    if (ubuntu_check(osver:"16.04", pkgname:"busybox-initramfs", pkgver:"1:1.22.0-15ubuntu1.4")) flag++;
    if (ubuntu_check(osver:"16.04", pkgname:"busybox-static", pkgver:"1:1.22.0-15ubuntu1.4")) flag++;
    if (ubuntu_check(osver:"16.04", pkgname:"udhcpc", pkgver:"1:1.22.0-15ubuntu1.4")) flag++;
    if (ubuntu_check(osver:"16.04", pkgname:"udhcpd", pkgver:"1:1.22.0-15ubuntu1.4")) flag++;
    if (ubuntu_check(osver:"18.04", pkgname:"busybox", pkgver:"1:1.27.2-2ubuntu3.2")) flag++;
    if (ubuntu_check(osver:"18.04", pkgname:"busybox-initramfs", pkgver:"1:1.27.2-2ubuntu3.2")) flag++;
    if (ubuntu_check(osver:"18.04", pkgname:"busybox-static", pkgver:"1:1.27.2-2ubuntu3.2")) flag++;
    if (ubuntu_check(osver:"18.04", pkgname:"udhcpc", pkgver:"1:1.27.2-2ubuntu3.2")) flag++;
    if (ubuntu_check(osver:"18.04", pkgname:"udhcpd", pkgver:"1:1.27.2-2ubuntu3.2")) flag++;
    if (ubuntu_check(osver:"18.10", pkgname:"busybox", pkgver:"1:1.27.2-2ubuntu4.1")) flag++;
    if (ubuntu_check(osver:"18.10", pkgname:"busybox-initramfs", pkgver:"1:1.27.2-2ubuntu4.1")) flag++;
    if (ubuntu_check(osver:"18.10", pkgname:"busybox-static", pkgver:"1:1.27.2-2ubuntu4.1")) flag++;
    if (ubuntu_check(osver:"18.10", pkgname:"udhcpc", pkgver:"1:1.27.2-2ubuntu4.1")) flag++;
    if (ubuntu_check(osver:"18.10", pkgname:"udhcpd", pkgver:"1:1.27.2-2ubuntu4.1")) flag++;
    
    if (flag)
    {
      security_report_v4(
        port       : 0,
        severity   : SECURITY_HOLE,
        extra      : ubuntu_report_get()
      );
      exit(0);
    }
    else
    {
      tested = ubuntu_pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "busybox / busybox-initramfs / busybox-static / udhcpc / udhcpd");
    }
    

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