Vulnerabilities > CVE-2018-20431 - NULL Pointer Dereference vulnerability in multiple products

#
# (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");

#
# (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");