Vulnerabilities > CVE-2018-7731 - NULL Pointer Dereference vulnerability in multiple products

047910
CVSS 5.5 - MEDIUM
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
HIGH
local
low complexity
exempi-project
canonical
CWE-476
nessus

Summary

An issue was discovered in Exempi through 2.4.4. XMPFiles/source/FormatSupport/WEBP_Support.cpp does not check whether a bitstream has a NULL value, leading to a NULL pointer dereference in the WEBP::VP8XChunk class.

Common Weakness Enumeration (CWE)

Nessus

  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2018-C442AAD4DC.NASL
    descriptionVersion **2.4.5** fixes the following security issues : - **CVE-2018-7728** - **CVE-2018-7729** - **CVE-2018-7730** - **CVE-2018-7731** Version **2.4.4** fixes the following security issues : - **CVE-2017-18233** - **CVE-2017-18236** Version **2.4.3** fixes the following security issues : - **CVE-2017-18234** - **CVE-2017-18235** - **CVE-2017-18237** Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-05
    modified2018-04-05
    plugin id108839
    published2018-04-05
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/108839
    titleFedora 27 : exempi (2018-c442aad4dc)
    code
    #%NASL_MIN_LEVEL 80502
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were  
    # extracted from Fedora Security Advisory FEDORA-2018-c442aad4dc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(108839);
      script_version("1.5");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");
    
      script_cve_id("CVE-2017-18233", "CVE-2017-18234", "CVE-2017-18235", "CVE-2017-18236", "CVE-2017-18237", "CVE-2018-7728", "CVE-2018-7729", "CVE-2018-7730", "CVE-2018-7731");
      script_xref(name:"FEDORA", value:"2018-c442aad4dc");
    
      script_name(english:"Fedora 27 : exempi (2018-c442aad4dc)");
      script_summary(english:"Checks rpm output for the updated package.");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote Fedora host is missing a security update."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "Version **2.4.5** fixes the following security issues :
    
      - **CVE-2018-7728**
    
      - **CVE-2018-7729**
    
      - **CVE-2018-7730**
    
      - **CVE-2018-7731**
    
    Version **2.4.4** fixes the following security issues :
    
      - **CVE-2017-18233**
    
      - **CVE-2017-18236**
    
    Version **2.4.3** fixes the following security issues :
    
      - **CVE-2017-18234**
    
      - **CVE-2017-18235**
    
      - **CVE-2017-18237**
    
    Note that Tenable Network Security has extracted the preceding
    description block directly from the Fedora update system website.
    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://bodhi.fedoraproject.org/updates/FEDORA-2018-c442aad4dc"
      );
      script_set_attribute(
        attribute:"solution", 
        value:"Update the affected exempi package."
      );
      script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
      script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:R/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:fedoraproject:fedora:exempi");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:27");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2018/03/06");
      script_set_attribute(attribute:"patch_publication_date", value:"2018/04/04");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/04/05");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
      script_family(english:"Fedora Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list");
    
      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/RedHat/release");
    if (isnull(release) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora");
    os_ver = pregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
    if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
    os_ver = os_ver[1];
    if (! preg(pattern:"^27([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 27", "Fedora " + os_ver);
    
    if (!get_kb_item("Host/RedHat/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$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu);
    
    
    flag = 0;
    if (rpm_check(release:"FC27", reference:"exempi-2.4.5-1.fc27")) flag++;
    
    
    if (flag)
    {
      security_report_v4(
        port       : 0,
        severity   : SECURITY_WARNING,
        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, "exempi");
    }
    
  • NASL familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-3668-1.NASL
    descriptionIt was discovered that Exempi incorrectly handled certain media files. If a user or automated system were tricked into opening a specially crafted file, a remote attacker could cause Exempi to hang or crash, resulting in a denial of service, or possibly execute arbitrary code. 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 id110321
    published2018-06-05
    reporterUbuntu Security Notice (C) 2018-2019 Canonical, Inc. / NASL script (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/110321
    titleUbuntu 14.04 LTS / 16.04 LTS / 17.10 : exempi vulnerabilities (USN-3668-1)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from Ubuntu Security Notice USN-3668-1. 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(110321);
      script_version("1.4");
      script_cvs_date("Date: 2019/09/18 12:31:48");
    
      script_cve_id("CVE-2017-18233", "CVE-2017-18234", "CVE-2017-18236", "CVE-2017-18238", "CVE-2018-7728", "CVE-2018-7729", "CVE-2018-7730", "CVE-2018-7731");
      script_xref(name:"USN", value:"3668-1");
    
      script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS / 17.10 : exempi vulnerabilities (USN-3668-1)");
      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:
    "It was discovered that Exempi incorrectly handled certain media files.
    If a user or automated system were tricked into opening a specially
    crafted file, a remote attacker could cause Exempi to hang or crash,
    resulting in a denial of service, or possibly execute arbitrary code.
    
    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/3668-1/"
      );
      script_set_attribute(
        attribute:"solution", 
        value:"Update the affected exempi and / or libexempi3 packages."
      );
      script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
      script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:R/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:canonical:ubuntu_linux:exempi");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libexempi3");
      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:17.10");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2018/03/06");
      script_set_attribute(attribute:"patch_publication_date", value:"2018/06/04");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/06/05");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"Ubuntu Security Notice (C) 2018-2019 Canonical, Inc. / NASL script (C) 2018-2019 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|17\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 14.04 / 16.04 / 17.10", "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:"exempi", pkgver:"2.2.1-1ubuntu1.1")) flag++;
    if (ubuntu_check(osver:"14.04", pkgname:"libexempi3", pkgver:"2.2.1-1ubuntu1.1")) flag++;
    if (ubuntu_check(osver:"16.04", pkgname:"exempi", pkgver:"2.2.2-2ubuntu0.1")) flag++;
    if (ubuntu_check(osver:"16.04", pkgname:"libexempi3", pkgver:"2.2.2-2ubuntu0.1")) flag++;
    if (ubuntu_check(osver:"17.10", pkgname:"exempi", pkgver:"2.4.3-1ubuntu1.1")) flag++;
    if (ubuntu_check(osver:"17.10", pkgname:"libexempi3", pkgver:"2.4.3-1ubuntu1.1")) flag++;
    
    if (flag)
    {
      security_report_v4(
        port       : 0,
        severity   : SECURITY_WARNING,
        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, "exempi / libexempi3");
    }
    
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2018-1C9F6768CF.NASL
    descriptionVersion **2.4.5** fixes the following security issues : - **CVE-2018-7728** - **CVE-2018-7729** - **CVE-2018-7730** - **CVE-2018-7731** Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-05
    modified2019-01-03
    plugin id120271
    published2019-01-03
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/120271
    titleFedora 28 : exempi (2018-1c9f6768cf)
    code
    #%NASL_MIN_LEVEL 80502
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were  
    # extracted from Fedora Security Advisory FEDORA-2018-1c9f6768cf.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(120271);
      script_version("1.4");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");
    
      script_cve_id("CVE-2018-7728", "CVE-2018-7729", "CVE-2018-7730", "CVE-2018-7731");
      script_xref(name:"FEDORA", value:"2018-1c9f6768cf");
    
      script_name(english:"Fedora 28 : exempi (2018-1c9f6768cf)");
      script_summary(english:"Checks rpm output for the updated package.");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote Fedora host is missing a security update."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "Version **2.4.5** fixes the following security issues :
    
      - **CVE-2018-7728**
    
      - **CVE-2018-7729**
    
      - **CVE-2018-7730**
    
      - **CVE-2018-7731**
    
    Note that Tenable Network Security has extracted the preceding
    description block directly from the Fedora update system website.
    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://bodhi.fedoraproject.org/updates/FEDORA-2018-1c9f6768cf"
      );
      script_set_attribute(
        attribute:"solution", 
        value:"Update the affected exempi package."
      );
      script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P");
      script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/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:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:exempi");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:28");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2018/03/06");
      script_set_attribute(attribute:"patch_publication_date", value:"2018/04/04");
      script_set_attribute(attribute:"plugin_publication_date", value:"2019/01/03");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
      script_family(english:"Fedora Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list");
    
      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/RedHat/release");
    if (isnull(release) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora");
    os_ver = pregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
    if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
    os_ver = os_ver[1];
    if (! preg(pattern:"^28([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 28", "Fedora " + os_ver);
    
    if (!get_kb_item("Host/RedHat/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$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu);
    
    
    flag = 0;
    if (rpm_check(release:"FC28", reference:"exempi-2.4.5-1.fc28")) flag++;
    
    
    if (flag)
    {
      security_report_v4(
        port       : 0,
        severity   : SECURITY_WARNING,
        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, "exempi");
    }