Vulnerabilities > CVE-2017-16931 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Xmlsoft Libxml2

047910
CVSS 9.8 - CRITICAL
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
network
low complexity
xmlsoft
CWE-119
critical
nessus

Summary

parser.c in libxml2 before 2.9.5 mishandles parameter-entity references because the NEXTL macro calls the xmlParserHandlePEReference function in the case of a '%' character in a DTD name.

Vulnerable Configurations

Part Description Count
Application
Xmlsoft
148

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.

Nessus

  • NASL familyHuawei Local Security Checks
    NASL idEULEROS_SA-2018-1089.NASL
    descriptionAccording to the versions of the libxml2 packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - Use-after-free vulnerability in libxml2 through 2.9.4, as used in Google Chrome before 52.0.2743.82, allows remote attackers to cause a denial of service or possibly have unspecified other impact via vectors related to the XPointer range-to function.(CVE-2016-5131) - parser.c in libxml2 before 2.9.5 mishandles parameter-entity references because the NEXTL macro calls the xmlParserHandlePEReference function in the case of a
    last seen2020-05-06
    modified2018-05-02
    plugin id109487
    published2018-05-02
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/109487
    titleEulerOS 2.0 SP2 : libxml2 (EulerOS-SA-2018-1089)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(109487);
      script_version("1.10");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/04");
    
      script_cve_id(
        "CVE-2016-5131",
        "CVE-2017-16931",
        "CVE-2017-16932",
        "CVE-2017-7375",
        "CVE-2017-7376"
      );
    
      script_name(english:"EulerOS 2.0 SP2 : libxml2 (EulerOS-SA-2018-1089)");
      script_summary(english:"Checks the rpm output for the updated packages.");
    
      script_set_attribute(attribute:"synopsis", value:
    "The remote EulerOS host is missing multiple security updates.");
      script_set_attribute(attribute:"description", value:
    "According to the versions of the libxml2 packages installed, the
    EulerOS installation on the remote host is affected by the following
    vulnerabilities :
    
      - Use-after-free vulnerability in libxml2 through 2.9.4,
        as used in Google Chrome before 52.0.2743.82, allows
        remote attackers to cause a denial of service or
        possibly have unspecified other impact via vectors
        related to the XPointer range-to
        function.(CVE-2016-5131)
    
      - parser.c in libxml2 before 2.9.5 mishandles
        parameter-entity references because the NEXTL macro
        calls the xmlParserHandlePEReference function in the
        case of a '%' character in a DTD name.(CVE-2017-16931)
    
      - parser.c in libxml2 before 2.9.5 does not prevent
        infinite recursion in parameter
        entities.)CVE-2017-16932)
    
      - A flaw in libxml2 allows remote XML entity inclusion
        with default parser flags (i.e., when the caller did
        not request entity substitution, DTD validation,
        external DTD subset loading, or default DTD
        attributes). Depending on the context, this may expose
        a higher-risk attack surface in libxml2 not usually
        reachable with default parser flags, and expose content
        from local files, HTTP, or FTP servers (which might be
        otherwise unreachable).(CVE-2017-7375)
    
      - Buffer overflow in libxml2 allows remote attackers to
        execute arbitrary code by leveraging an incorrect limit
        for port values when handling redirects.(CVE-2017-7376)
    
    Note that Tenable Network Security has extracted the preceding
    description block directly from the EulerOS security advisory. Tenable
    has attempted to automatically clean and format it as much as possible
    without introducing additional issues.");
      # https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2018-1089
      script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a0348b98");
      script_set_attribute(attribute:"solution", value:
    "Update the affected libxml2 packages.");
      script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
      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:N/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:"patch_publication_date", value:"2018/03/29");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/05/02");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libxml2");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libxml2-devel");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libxml2-python");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_family(english:"Huawei Local Security Checks");
    
      script_copyright(english:"This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/sp");
      script_exclude_keys("Host/EulerOS/uvp_version");
    
      exit(0);
    }
    
    include("audit.inc");
    include("global_settings.inc");
    include("rpm.inc");
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    
    release = get_kb_item("Host/EulerOS/release");
    if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
    if (release !~ "^EulerOS release 2\.0(\D|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0");
    
    sp = get_kb_item("Host/EulerOS/sp");
    if (isnull(sp) || sp !~ "^(2)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP2");
    
    uvp = get_kb_item("Host/EulerOS/uvp_version");
    if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP2", "EulerOS UVP " + uvp);
    
    if (!get_kb_item("Host/EulerOS/rpm-list")) 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$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
    if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);
    
    flag = 0;
    
    pkgs = ["libxml2-2.9.1-6.3.h10",
            "libxml2-devel-2.9.1-6.3.h10",
            "libxml2-python-2.9.1-6.3.h10"];
    
    foreach (pkg in pkgs)
      if (rpm_check(release:"EulerOS-2.0", sp:"2", reference:pkg)) flag++;
    
    if (flag)
    {
      security_report_v4(
        port       : 0,
        severity   : SECURITY_HOLE,
        extra      : rpm_report_get()
      );
      exit(0);
    }
    else
    {
      tested = pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libxml2");
    }
    
  • NASL familyHuawei Local Security Checks
    NASL idEULEROS_SA-2018-1257.NASL
    descriptionAccording to the versions of the libxml2 packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : - A remote code execution vulnerability in libxml2 could enable an attacker using a specially crafted file to execute arbitrary code within the context of an unprivileged process. This issue is rated as High due to the possibility of remote code execution in an application that uses this library. Product: Android. Versions: 4.4.4, 5.0.2, 5.1.1, 6.0, 6.0.1, 7.0, 7.1.1, 7.1.2. Android ID: A-37104170.(CVE-2017-0663) - parser.c in libxml2 before 2.9.5 mishandles parameter-entity references because the NEXTL macro calls the xmlParserHandlePEReference function in the case of a
    last seen2020-06-01
    modified2020-06-02
    plugin id117566
    published2018-09-18
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/117566
    titleEulerOS Virtualization 2.5.1 : libxml2 (EulerOS-SA-2018-1257)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(117566);
      script_version("1.5");
      script_cvs_date("Date: 2019/06/28 11:31:59");
    
      script_cve_id(
        "CVE-2017-0663",
        "CVE-2017-16931",
        "CVE-2017-16932"
      );
    
      script_name(english:"EulerOS Virtualization 2.5.1 : libxml2 (EulerOS-SA-2018-1257)");
      script_summary(english:"Checks the rpm output for the updated packages.");
    
      script_set_attribute(attribute:"synopsis", value:
    "The remote EulerOS Virtualization host is missing multiple security
    updates.");
      script_set_attribute(attribute:"description", value:
    "According to the versions of the libxml2 packages installed, the
    EulerOS Virtualization installation on the remote host is affected by
    the following vulnerabilities :
    
      - A remote code execution vulnerability in libxml2 could
        enable an attacker using a specially crafted file to
        execute arbitrary code within the context of an
        unprivileged process. This issue is rated as High due
        to the possibility of remote code execution in an
        application that uses this library. Product: Android.
        Versions: 4.4.4, 5.0.2, 5.1.1, 6.0, 6.0.1, 7.0, 7.1.1,
        7.1.2. Android ID: A-37104170.(CVE-2017-0663)
    
      - parser.c in libxml2 before 2.9.5 mishandles
        parameter-entity references because the NEXTL macro
        calls the xmlParserHandlePEReference function in the
        case of a '%' character in a DTD name.(CVE-2017-16931)
    
      - parser.c in libxml2 before 2.9.5 does not prevent
        infinite recursion in parameter
        entities.(CVE-2017-16932)
    
    Note that Tenable Network Security has extracted the preceding
    description block directly from the EulerOS security advisory. Tenable
    has attempted to automatically clean and format it as much as possible
    without introducing additional issues.");
      # https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2018-1257
      script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?2243ef1a");
      script_set_attribute(attribute:"solution", value:
    "Update the affected libxml2 packages.");
      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:"patch_publication_date", value:"2018/07/24");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/09/18");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libxml2");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libxml2-devel");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libxml2-python");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:uvp:2.5.1");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_family(english:"Huawei Local Security Checks");
    
      script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/uvp_version");
    
      exit(0);
    }
    
    include("audit.inc");
    include("global_settings.inc");
    include("rpm.inc");
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    
    release = get_kb_item("Host/EulerOS/release");
    if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
    uvp = get_kb_item("Host/EulerOS/uvp_version");
    if (uvp != "2.5.1") audit(AUDIT_OS_NOT, "EulerOS Virtualization 2.5.1");
    if (!get_kb_item("Host/EulerOS/rpm-list")) 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$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
    if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);
    
    flag = 0;
    
    pkgs = ["libxml2-2.9.1-6.3.h3",
            "libxml2-devel-2.9.1-6.3.h3",
            "libxml2-python-2.9.1-6.3.h3"];
    
    foreach (pkg in pkgs)
      if (rpm_check(release:"EulerOS-2.0", reference:pkg)) flag++;
    
    if (flag)
    {
      security_report_v4(
        port       : 0,
        severity   : SECURITY_HOLE,
        extra      : rpm_report_get()
      );
      exit(0);
    }
    else
    {
      tested = pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libxml2");
    }
    
  • NASL familyHuawei Local Security Checks
    NASL idEULEROS_SA-2018-1156.NASL
    descriptionAccording to the versions of the libxml2 packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - Use-after-free vulnerability in libxml2 through 2.9.4, as used in Google Chrome before 52.0.2743.82, allows remote attackers to cause a denial of service or possibly have unspecified other impact via vectors related to the XPointer range-to function.(CVE-2016-5131) - parser.c in libxml2 before 2.9.5 mishandles parameter-entity references because the NEXTL macro calls the xmlParserHandlePEReference function in the case of a
    last seen2020-05-06
    modified2018-06-28
    plugin id110732
    published2018-06-28
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/110732
    titleEulerOS 2.0 SP3 : libxml2 (EulerOS-SA-2018-1156)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(110732);
      script_version("1.6");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/04");
    
      script_cve_id(
        "CVE-2016-5131",
        "CVE-2017-16931",
        "CVE-2017-16932"
      );
    
      script_name(english:"EulerOS 2.0 SP3 : libxml2 (EulerOS-SA-2018-1156)");
      script_summary(english:"Checks the rpm output for the updated packages.");
    
      script_set_attribute(attribute:"synopsis", value:
    "The remote EulerOS host is missing multiple security updates.");
      script_set_attribute(attribute:"description", value:
    "According to the versions of the libxml2 packages installed, the
    EulerOS installation on the remote host is affected by the following
    vulnerabilities :
    
      - Use-after-free vulnerability in libxml2 through 2.9.4,
        as used in Google Chrome before 52.0.2743.82, allows
        remote attackers to cause a denial of service or
        possibly have unspecified other impact via vectors
        related to the XPointer range-to
        function.(CVE-2016-5131)
    
      - parser.c in libxml2 before 2.9.5 mishandles
        parameter-entity references because the NEXTL macro
        calls the xmlParserHandlePEReference function in the
        case of a '%' character in a DTD name.(CVE-2017-16931)
    
      - parser.c in libxml2 before 2.9.5 does not prevent
        infinite recursion in parameter
        entities.)CVE-2017-16932)
    
    Note that Tenable Network Security has extracted the preceding
    description block directly from the EulerOS security advisory. Tenable
    has attempted to automatically clean and format it as much as possible
    without introducing additional issues.");
      # https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2018-1156
      script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b2b7c04b");
      script_set_attribute(attribute:"solution", value:
    "Update the affected libxml2 packages.");
      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:"patch_publication_date", value:"2018/06/09");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/06/28");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libxml2");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libxml2-devel");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libxml2-python");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_family(english:"Huawei Local Security Checks");
    
      script_copyright(english:"This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/sp");
      script_exclude_keys("Host/EulerOS/uvp_version");
    
      exit(0);
    }
    
    include("audit.inc");
    include("global_settings.inc");
    include("rpm.inc");
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    
    release = get_kb_item("Host/EulerOS/release");
    if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
    if (release !~ "^EulerOS release 2\.0(\D|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0");
    
    sp = get_kb_item("Host/EulerOS/sp");
    if (isnull(sp) || sp !~ "^(3)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP3");
    
    uvp = get_kb_item("Host/EulerOS/uvp_version");
    if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP3", "EulerOS UVP " + uvp);
    
    if (!get_kb_item("Host/EulerOS/rpm-list")) 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$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
    if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);
    
    flag = 0;
    
    pkgs = ["libxml2-2.9.1-6.3.h10",
            "libxml2-devel-2.9.1-6.3.h10",
            "libxml2-python-2.9.1-6.3.h10"];
    
    foreach (pkg in pkgs)
      if (rpm_check(release:"EulerOS-2.0", sp:"3", reference:pkg)) flag++;
    
    if (flag)
    {
      security_report_v4(
        port       : 0,
        severity   : SECURITY_HOLE,
        extra      : rpm_report_get()
      );
      exit(0);
    }
    else
    {
      tested = pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libxml2");
    }
    
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DLA-1194.NASL
    descriptionCVE-2017-16931 parser.c in libxml2 before 2.9.5 mishandles parameter-entity references because the NEXTL macro calls the xmlParserHandlePEReference function in the case of a
    last seen2020-03-17
    modified2017-12-01
    plugin id104936
    published2017-12-01
    reporterThis script is Copyright (C) 2017-2020 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/104936
    titleDebian DLA-1194-1 : libxml2 security update
    code
    #%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-1194-1. The text
    # itself is copyright (C) Software in the Public Interest, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(104936);
      script_version("3.5");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12");
    
      script_cve_id("CVE-2017-16931", "CVE-2017-16932");
    
      script_name(english:"Debian DLA-1194-1 : libxml2 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:
    "CVE-2017-16931 parser.c in libxml2 before 2.9.5 mishandles
    parameter-entity references because the NEXTL macro calls the
    xmlParserHandlePEReference function in the case of a '%' character in
    a DTD name.
    
    CVE-2017-16932 parser.c in libxml2 before 2.9.5 does not prevent
    infinite recursion in parameter entities.
    
    For Debian 7 'Wheezy', these problems have been fixed in version
    2.8.0+dfsg1-7+wheezy11.
    
    We recommend that you upgrade your libxml2 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/2017/11/msg00041.html"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://packages.debian.org/source/wheezy/libxml2"
      );
      script_set_attribute(attribute:"solution", value:"Upgrade 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:U/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:U/RL:O/RC:C");
      script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
      script_set_attribute(attribute:"exploit_available", value:"false");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libxml2");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libxml2-dbg");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libxml2-dev");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libxml2-doc");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libxml2-utils");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libxml2-utils-dbg");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python-libxml2");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python-libxml2-dbg");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");
    
      script_set_attribute(attribute:"patch_publication_date", value:"2017/11/30");
      script_set_attribute(attribute:"plugin_publication_date", value:"2017/12/01");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2017-2020 Tenable Network Security, Inc.");
      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:"libxml2", reference:"2.8.0+dfsg1-7+wheezy11")) flag++;
    if (deb_check(release:"7.0", prefix:"libxml2-dbg", reference:"2.8.0+dfsg1-7+wheezy11")) flag++;
    if (deb_check(release:"7.0", prefix:"libxml2-dev", reference:"2.8.0+dfsg1-7+wheezy11")) flag++;
    if (deb_check(release:"7.0", prefix:"libxml2-doc", reference:"2.8.0+dfsg1-7+wheezy11")) flag++;
    if (deb_check(release:"7.0", prefix:"libxml2-utils", reference:"2.8.0+dfsg1-7+wheezy11")) flag++;
    if (deb_check(release:"7.0", prefix:"libxml2-utils-dbg", reference:"2.8.0+dfsg1-7+wheezy11")) flag++;
    if (deb_check(release:"7.0", prefix:"python-libxml2", reference:"2.8.0+dfsg1-7+wheezy11")) flag++;
    if (deb_check(release:"7.0", prefix:"python-libxml2-dbg", reference:"2.8.0+dfsg1-7+wheezy11")) 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 familyHuawei Local Security Checks
    NASL idEULEROS_SA-2018-1088.NASL
    descriptionAccording to the versions of the libxml2 packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - Use-after-free vulnerability in libxml2 through 2.9.4, as used in Google Chrome before 52.0.2743.82, allows remote attackers to cause a denial of service or possibly have unspecified other impact via vectors related to the XPointer range-to function.(CVE-2016-5131) - parser.c in libxml2 before 2.9.5 mishandles parameter-entity references because the NEXTL macro calls the xmlParserHandlePEReference function in the case of a
    last seen2020-05-06
    modified2018-05-02
    plugin id109486
    published2018-05-02
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/109486
    titleEulerOS 2.0 SP1 : libxml2 (EulerOS-SA-2018-1088)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(109486);
      script_version("1.9");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/04");
    
      script_cve_id(
        "CVE-2016-5131",
        "CVE-2017-16931",
        "CVE-2017-16932"
      );
    
      script_name(english:"EulerOS 2.0 SP1 : libxml2 (EulerOS-SA-2018-1088)");
      script_summary(english:"Checks the rpm output for the updated packages.");
    
      script_set_attribute(attribute:"synopsis", value:
    "The remote EulerOS host is missing multiple security updates.");
      script_set_attribute(attribute:"description", value:
    "According to the versions of the libxml2 packages installed, the
    EulerOS installation on the remote host is affected by the following
    vulnerabilities :
    
      - Use-after-free vulnerability in libxml2 through 2.9.4,
        as used in Google Chrome before 52.0.2743.82, allows
        remote attackers to cause a denial of service or
        possibly have unspecified other impact via vectors
        related to the XPointer range-to
        function.(CVE-2016-5131)
    
      - parser.c in libxml2 before 2.9.5 mishandles
        parameter-entity references because the NEXTL macro
        calls the xmlParserHandlePEReference function in the
        case of a '%' character in a DTD name.(CVE-2017-16931)
    
      - parser.c in libxml2 before 2.9.5 does not prevent
        infinite recursion in parameter
        entities.)CVE-2017-16932)
    
    Note that Tenable Network Security has extracted the preceding
    description block directly from the EulerOS security advisory. Tenable
    has attempted to automatically clean and format it as much as possible
    without introducing additional issues.");
      # https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2018-1088
      script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3344f26e");
      script_set_attribute(attribute:"solution", value:
    "Update the affected libxml2 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:U/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:U/RL:O/RC:C");
    
      script_set_attribute(attribute:"patch_publication_date", value:"2018/03/29");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/05/02");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libxml2");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libxml2-devel");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libxml2-python");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_family(english:"Huawei Local Security Checks");
    
      script_copyright(english:"This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/sp");
      script_exclude_keys("Host/EulerOS/uvp_version");
    
      exit(0);
    }
    
    include("audit.inc");
    include("global_settings.inc");
    include("rpm.inc");
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    
    release = get_kb_item("Host/EulerOS/release");
    if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
    if (release !~ "^EulerOS release 2\.0(\D|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0");
    
    sp = get_kb_item("Host/EulerOS/sp");
    if (isnull(sp) || sp !~ "^(1)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP1");
    
    uvp = get_kb_item("Host/EulerOS/uvp_version");
    if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP1", "EulerOS UVP " + uvp);
    
    if (!get_kb_item("Host/EulerOS/rpm-list")) 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$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
    if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);
    
    flag = 0;
    
    pkgs = ["libxml2-2.9.1-6.3.h10",
            "libxml2-devel-2.9.1-6.3.h10",
            "libxml2-python-2.9.1-6.3.h10"];
    
    foreach (pkg in pkgs)
      if (rpm_check(release:"EulerOS-2.0", sp:"1", reference:pkg)) flag++;
    
    if (flag)
    {
      security_report_v4(
        port       : 0,
        severity   : SECURITY_HOLE,
        extra      : rpm_report_get()
      );
      exit(0);
    }
    else
    {
      tested = pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libxml2");
    }
    
  • NASL familyHuawei Local Security Checks
    NASL idEULEROS_SA-2018-1258.NASL
    descriptionAccording to the versions of the libxml2 packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities : - A remote code execution vulnerability in libxml2 could enable an attacker using a specially crafted file to execute arbitrary code within the context of an unprivileged process. This issue is rated as High due to the possibility of remote code execution in an application that uses this library. Product: Android. Versions: 4.4.4, 5.0.2, 5.1.1, 6.0, 6.0.1, 7.0, 7.1.1, 7.1.2. Android ID: A-37104170.(CVE-2017-0663) - parser.c in libxml2 before 2.9.5 mishandles parameter-entity references because the NEXTL macro calls the xmlParserHandlePEReference function in the case of a
    last seen2020-06-01
    modified2020-06-02
    plugin id117567
    published2018-09-18
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/117567
    titleEulerOS Virtualization 2.5.0 : libxml2 (EulerOS-SA-2018-1258)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(117567);
      script_version("1.5");
      script_cvs_date("Date: 2019/06/28 11:31:59");
    
      script_cve_id(
        "CVE-2017-0663",
        "CVE-2017-16931",
        "CVE-2017-16932"
      );
    
      script_name(english:"EulerOS Virtualization 2.5.0 : libxml2 (EulerOS-SA-2018-1258)");
      script_summary(english:"Checks the rpm output for the updated packages.");
    
      script_set_attribute(attribute:"synopsis", value:
    "The remote EulerOS Virtualization host is missing multiple security
    updates.");
      script_set_attribute(attribute:"description", value:
    "According to the versions of the libxml2 packages installed, the
    EulerOS Virtualization installation on the remote host is affected by
    the following vulnerabilities :
    
      - A remote code execution vulnerability in libxml2 could
        enable an attacker using a specially crafted file to
        execute arbitrary code within the context of an
        unprivileged process. This issue is rated as High due
        to the possibility of remote code execution in an
        application that uses this library. Product: Android.
        Versions: 4.4.4, 5.0.2, 5.1.1, 6.0, 6.0.1, 7.0, 7.1.1,
        7.1.2. Android ID: A-37104170.(CVE-2017-0663)
    
      - parser.c in libxml2 before 2.9.5 mishandles
        parameter-entity references because the NEXTL macro
        calls the xmlParserHandlePEReference function in the
        case of a '%' character in a DTD name.(CVE-2017-16931)
    
      - parser.c in libxml2 before 2.9.5 does not prevent
        infinite recursion in parameter
        entities.(CVE-2017-16932)
    
    Note that Tenable Network Security has extracted the preceding
    description block directly from the EulerOS security advisory. Tenable
    has attempted to automatically clean and format it as much as possible
    without introducing additional issues.");
      # https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2018-1258
      script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?7bc660a1");
      script_set_attribute(attribute:"solution", value:
    "Update the affected libxml2 packages.");
      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:"patch_publication_date", value:"2018/07/24");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/09/18");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libxml2");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libxml2-devel");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libxml2-python");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:uvp:2.5.0");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_family(english:"Huawei Local Security Checks");
    
      script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/uvp_version");
    
      exit(0);
    }
    
    include("audit.inc");
    include("global_settings.inc");
    include("rpm.inc");
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    
    release = get_kb_item("Host/EulerOS/release");
    if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
    uvp = get_kb_item("Host/EulerOS/uvp_version");
    if (uvp != "2.5.0") audit(AUDIT_OS_NOT, "EulerOS Virtualization 2.5.0");
    if (!get_kb_item("Host/EulerOS/rpm-list")) 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$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
    if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);
    
    flag = 0;
    
    pkgs = ["libxml2-2.9.1-6.3.h3",
            "libxml2-devel-2.9.1-6.3.h3",
            "libxml2-python-2.9.1-6.3.h3"];
    
    foreach (pkg in pkgs)
      if (rpm_check(release:"EulerOS-2.0", reference:pkg)) flag++;
    
    if (flag)
    {
      security_report_v4(
        port       : 0,
        severity   : SECURITY_HOLE,
        extra      : rpm_report_get()
      );
      exit(0);
    }
    else
    {
      tested = pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libxml2");
    }
    
  • NASL familyAmazon Linux Local Security Checks
    NASL idAL2_ALAS-2019-1301.NASL
    descriptionxpointer.c in libxml2 before 2.9.5 (as used in Apple iOS before 10, OS X before 10.12, tvOS before 10, and watchOS before 3, and other products) does not forbid namespace nodes in XPointer ranges, which allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free and memory corruption) via a crafted XML document. (CVE-2016-4658) parser.c in libxml2 before 2.9.5 mishandles parameter-entity references because the NEXTL macro calls the xmlParserHandlePEReference function in the case of a
    last seen2020-06-01
    modified2020-06-02
    plugin id129559
    published2019-10-04
    reporterThis script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/129559
    titleAmazon Linux 2 : libxml2 (ALAS-2019-1301)