Vulnerabilities > CVE-2018-1000544 - Unrestricted Upload of File with Dangerous Type vulnerability in multiple products

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
rubyzip-project
debian
redhat
CWE-434
critical
nessus
NVD
Published: 2018-06-26
Updated: 2024-11-21

Summary

rubyzip gem rubyzip version 1.2.1 and earlier contains a Directory Traversal vulnerability in Zip::File component that can result in write arbitrary files to the filesystem. This attack appear to be exploitable via If a site allows uploading of .zip files , an attacker can upload a malicious file that contains symlinks or files with absolute pathnames "../" to write arbitrary files to the filesystem..

Vulnerable Configurations

Part Description Count
Application
Rubyzip_Project
34
Application
Redhat
1
OS
Debian
2

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Accessing Functionality Not Properly Constrained by ACLs
    In applications, particularly web applications, access to functionality is mitigated by the authorization framework, whose job it is to map ACLs to elements of the application's functionality; particularly URL's for web apps. In the case that the administrator failed to specify an ACL for a particular element, an attacker may be able to access it with impunity. An attacker with the ability to access functionality not properly constrained by ACLs can obtain sensitive information and possibly compromise the entire application. Such an attacker can access resources that must be available only to users at a higher privilege level, can access management sections of the application or can run queries for data that he is otherwise not supposed to.
  • Privilege Abuse
    An adversary is able to exploit features of the target that should be reserved for privileged users or administrators but are exposed to use by lower or non-privileged accounts. Access to sensitive information and functionality must be controlled to ensure that only authorized users are able to access these resources. If access control mechanisms are absent or misconfigured, a user may be able to access resources that are intended only for higher level users. An adversary may be able to exploit this to utilize a less trusted account to gain information and perform activities reserved for more trusted accounts. This attack differs from privilege escalation and other privilege stealing attacks in that the adversary never actually escalates their privileges but instead is able to use a lesser degree of privilege to access resources that should be (but are not) reserved for higher privilege accounts. Likewise, the adversary does not exploit trust or subvert systems - all control functionality is working as configured but the configuration does not adequately protect sensitive resources at an appropriate level.

Nessus

NASL familyDebian Local Security Checks
NASL idDEBIAN_DLA-1467.NASL
descriptionIt was found that rubyzip, a Ruby module for reading and writing zip files, contained a Directory Traversal vulnerability that can be exploited to write arbitrary files to the filesystem. For Debian 8
last seen2020-06-01
modified2020-06-02
plugin id111764
published2018-08-16
reporterThis script is Copyright (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/111764
titleDebian DLA-1467-1 : ruby-zip security update
code
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-1467-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(111764);
  script_version("1.3");
  script_cvs_date("Date: 2018/08/31 12:25:01");

  script_cve_id("CVE-2018-1000544");

  script_name(english:"Debian DLA-1467-1 : ruby-zip 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 update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"It was found that rubyzip, a Ruby module for reading and writing zip
files, contained a Directory Traversal vulnerability that can be
exploited to write arbitrary files to the filesystem.

For Debian 8 'Jessie', this problem has been fixed in version
1.1.6-1+deb8u2.

We recommend that you upgrade your ruby-zip 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/2018/08/msg00013.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/jessie/ruby-zip"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Upgrade the affected ruby-zip package."
  );
  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:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ruby-zip");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2018/08/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/08/16");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018 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:"ruby-zip", reference:"1.1.6-1+deb8u2")) 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");

Redhat

advisories
rhsa
idRHSA-2018:3466
rpms
  • ansible-tower-0:3.2.7-1.el7at
  • ansible-tower-server-0:3.2.7-1.el7at
  • ansible-tower-setup-0:3.2.7-1.el7at
  • ansible-tower-ui-0:3.2.7-1.el7at
  • ansible-tower-venv-ansible-0:3.2.7-1.el7at
  • ansible-tower-venv-tower-0:3.2.7-1.el7at
  • cfme-0:5.9.5.3-1.el7cf
  • cfme-amazon-smartstate-0:5.9.5.3-1.el7cf
  • cfme-appliance-0:5.9.5.3-1.el7cf
  • cfme-appliance-common-0:5.9.5.3-1.el7cf
  • cfme-appliance-debuginfo-0:5.9.5.3-1.el7cf
  • cfme-appliance-tools-0:5.9.5.3-1.el7cf
  • cfme-debuginfo-0:5.9.5.3-1.el7cf
  • cfme-gemset-0:5.9.5.3-1.el7cf
  • cfme-gemset-debuginfo-0:5.9.5.3-1.el7cf

References