Vulnerabilities > CVE-2018-20430 - Out-of-bounds Read vulnerability in multiple products

047910
CVSS 6.5 - MEDIUM
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
HIGH
network
low complexity
gnu
debian
CWE-125
nessus

Summary

GNU Libextractor through 1.8 has an out-of-bounds read vulnerability in the function history_extract() in plugins/ole2_extractor.c, related to EXTRACTOR_common_convert_to_utf8 in common/convert.c.

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Overread Buffers
    An adversary attacks a target by providing input that causes an application to read beyond the boundary of a defined buffer. This typically occurs when a value influencing where to start or stop reading is set to reflect positions outside of the valid memory location of the buffer. This type of attack may result in exposure of sensitive information, a system crash, or arbitrary code execution.

Nessus

  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DLA-1616.NASL
    descriptionTwo security issues were discovered in libextractor, a library for extracting meta data from files of arbitrary type. An out-of-bounds read in common/convert.c and a NULL pointer Dereference in the OLE2 extractor may lead to a denial of service (application crash). For Debian 8
    last seen2020-03-26
    modified2018-12-27
    plugin id119876
    published2018-12-27
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/119876
    titleDebian DLA-1616-1 : libextractor security update
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from Debian Security Advisory DLA-1616-1. The text
    # itself is copyright (C) Software in the Public Interest, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(119876);
      script_version("1.3");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/25");
    
      script_cve_id("CVE-2018-20430", "CVE-2018-20431");
    
      script_name(english:"Debian DLA-1616-1 : libextractor 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:
    "Two security issues were discovered in libextractor, a library for
    extracting meta data from files of arbitrary type. An out-of-bounds
    read in common/convert.c and a NULL pointer Dereference in the OLE2
    extractor may lead to a denial of service (application crash).
    
    For Debian 8 'Jessie', these problems have been fixed in version
    1:1.3-2+deb8u4.
    
    We recommend that you upgrade your libextractor 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/2018/12/msg00015.html"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://packages.debian.org/source/jessie/libextractor"
      );
      script_set_attribute(attribute:"solution", value:"Upgrade the affected packages.");
      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:N/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:debian:debian_linux:extract");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libextractor-dbg");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libextractor-dev");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libextractor3");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2018/12/24");
      script_set_attribute(attribute:"patch_publication_date", value:"2018/12/24");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/12/27");
      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:"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:"extract", reference:"1:1.3-2+deb8u4")) flag++;
    if (deb_check(release:"8.0", prefix:"libextractor-dbg", reference:"1:1.3-2+deb8u4")) flag++;
    if (deb_check(release:"8.0", prefix:"libextractor-dev", reference:"1:1.3-2+deb8u4")) flag++;
    if (deb_check(release:"8.0", prefix:"libextractor3", reference:"1:1.3-2+deb8u4")) flag++;
    
    if (flag)
    {
      if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
      else security_warning(0);
      exit(0);
    }
    else audit(AUDIT_HOST_NOT, "affected");
    
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-4361.NASL
    descriptionSeveral vulnerabilities were discovered in libextractor, a library to extract arbitrary meta-data from files, which may lead to denial of service or memory disclosure if a malformed OLE file is processed.
    last seen2020-03-23
    modified2018-12-31
    plugin id119943
    published2018-12-31
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/119943
    titleDebian DSA-4361-1 : libextractor - security update
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were  
    # extracted from Debian Security Advisory DSA-4361. The text 
    # itself is copyright (C) Software in the Public Interest, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(119943);
      script_version("1.3");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/23");
    
      script_cve_id("CVE-2018-20430", "CVE-2018-20431");
      script_xref(name:"DSA", value:"4361");
    
      script_name(english:"Debian DSA-4361-1 : libextractor - 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:
    "Several vulnerabilities were discovered in libextractor, a library to
    extract arbitrary meta-data from files, which may lead to denial of
    service or memory disclosure if a malformed OLE file is processed."
      );
      # https://security-tracker.debian.org/tracker/source-package/libextractor
      script_set_attribute(
        attribute:"see_also",
        value:"http://www.nessus.org/u?bd14df80"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://packages.debian.org/source/stretch/libextractor"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.debian.org/security/2018/dsa-4361"
      );
      script_set_attribute(
        attribute:"solution", 
        value:
    "Upgrade the libextractor packages.
    
    For the stable distribution (stretch), these problems have been fixed
    in version 1:1.3-4+deb9u3."
      );
      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:N/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:debian:debian_linux:libextractor");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2018/12/24");
      script_set_attribute(attribute:"patch_publication_date", value:"2018/12/28");
      script_set_attribute(attribute:"plugin_publication_date", value:"2018/12/31");
      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:"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:"extract", reference:"1:1.3-4+deb9u3")) flag++;
    if (deb_check(release:"9.0", prefix:"libextractor-dbg", reference:"1:1.3-4+deb9u3")) flag++;
    if (deb_check(release:"9.0", prefix:"libextractor-dev", reference:"1:1.3-4+deb9u3")) flag++;
    if (deb_check(release:"9.0", prefix:"libextractor3", reference:"1:1.3-4+deb9u3")) flag++;
    
    if (flag)
    {
      if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
      else security_warning(0);
      exit(0);
    }
    else audit(AUDIT_HOST_NOT, "affected");