Vulnerabilities > CVE-2017-15602 - Infinite Loop vulnerability in GNU Libextractor 1.4

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
gnu
CWE-835
nessus

Summary

In GNU Libextractor 1.4, there is an integer signedness error for the chunk size in the EXTRACTOR_nsfe_extract_method function in plugins/nsfe_extractor.c, leading to an infinite loop for a crafted size.

Vulnerable Configurations

Part Description Count
Application
Gnu
1

Nessus

NASL familyDebian Local Security Checks
NASL idDEBIAN_DLA-1198.NASL
descriptionLeon Zhao discovered several security vulnerabilities in libextractor, a universal library and command-line tool to obtain meta-data about files. NULL pointer Dereferences, heap-based buffer overflows, integer signedness errors and out-of-bounds read may lead to a denial of service (application crash) or have other unspecified impact. For Debian 7
last seen2020-03-17
modified2017-12-05
plugin id105009
published2017-12-05
reporterThis script is Copyright (C) 2017-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/105009
titleDebian DLA-1198-1 : libextractor 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-1198-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(105009);
  script_version("3.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12");

  script_cve_id("CVE-2017-15266", "CVE-2017-15267", "CVE-2017-15600", "CVE-2017-15601", "CVE-2017-15602", "CVE-2017-15922");

  script_name(english:"Debian DLA-1198-1 : 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:
"Leon Zhao discovered several security vulnerabilities in libextractor,
a universal library and command-line tool to obtain meta-data about
files. NULL pointer Dereferences, heap-based buffer overflows, integer
signedness errors and out-of-bounds read may lead to a
denial of service (application crash) or have other unspecified
impact.

For Debian 7 'Wheezy', these problems have been fixed in version
1:0.6.3-5+deb7u1.

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/2017/12/msg00000.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/wheezy/libextractor"
  );
  script_set_attribute(attribute:"solution", value:"Upgrade the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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:N/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:"exploit_available", value:"false");

  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:libextractor-plugins");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libextractor3");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2017/12/04");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/12/05");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2020 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:"7.0", prefix:"extract", reference:"1:0.6.3-5+deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"libextractor-dbg", reference:"1:0.6.3-5+deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"libextractor-dev", reference:"1:0.6.3-5+deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"libextractor-plugins", reference:"1:0.6.3-5+deb7u1")) flag++;
if (deb_check(release:"7.0", prefix:"libextractor3", reference:"1:0.6.3-5+deb7u1")) 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");