Vulnerabilities > CVE-2017-16544 - Code Injection vulnerability in multiple products

047910
CVSS 8.8 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
LOW
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
network
low complexity
busybox
debian
vmware
redlion
canonical
CWE-94
nessus
NVD
Published: 2017-11-20
Updated: 2022-10-28

Summary

In the add_match function in libbb/lineedit.c in BusyBox through 1.27.2, the tab autocomplete feature of the shell, used to get a list of filenames in a directory, does not sanitize filenames and results in executing any escape sequence in the terminal. This could potentially result in code execution, arbitrary file writes, or other attacks.

Vulnerable Configurations

Part Description Count
Application
Busybox
140
OS
Debian
2
OS
Vmware
180
OS
Redlion
2
OS
Canonical
2
Hardware
Redlion
2

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Leverage Executable Code in Non-Executable Files
    An attack of this type exploits a system's trust in configuration and resource files, when the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high. The attack can be directed at a client system, such as causing buffer overrun through loading seemingly benign image files, as in Microsoft Security Bulletin MS04-028 where specially crafted JPEG files could cause a buffer overrun once loaded into the browser. Another example targets clients reading pdf files. In this case the attacker simply appends javascript to the end of a legitimate url for a pdf (http://www.gnucitizen.org/blog/danger-danger-danger/) http://path/to/pdf/file.pdf#whatever_name_you_want=javascript:your_code_here The client assumes that they are reading a pdf, but the attacker has modified the resource and loaded executable javascript into the client's browser process. The attack can also target server processes. The attacker edits the resource or configuration file, for example a web.xml file used to configure security permissions for a J2EE app server, adding role name "public" grants all users with the public role the ability to use the administration functionality. The server trusts its configuration file to be correct, but when they are manipulated, the attacker gains full control.
  • Manipulating User-Controlled Variables
    This attack targets user controlled variables (DEBUG=1, PHP Globals, and So Forth). An attacker can override environment variables leveraging user-supplied, untrusted query variables directly used on the application server without any data sanitization. In extreme cases, the attacker can change variables controlling the business logic of the application. For instance, in languages like PHP, a number of poorly set default configurations may allow the user to override variables.

Nessus

  • NASL familyVMware ESX Local Security Checks
    NASL idVMWARE_VMSA-2019-0013.NASL
    descriptiona. VMware ESXi busybox command injection vulnerability ESXi contains a command injection vulnerability due to the use of vulnerable version of busybox that does not sanitize filenames which may result into executing any escape sequence in the shell. An attacker may exploit this issue by tricking an ESXi Admin into executing shell commands by providing a malicious file. b. ESXi Host Client information disclosure vulnerability An information disclosure vulnerability in clients arising from insufficient session expiration. An attacker with physical access or an ability to mimic a websocket connection to a users browser may be able to obtain control of a VM Console after the user has logged out or their session has timed out.
    last seen2020-06-01
    modified2020-06-02
    plugin id128994
    published2019-09-18
    reporterThis script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/128994
    titleVMSA-2019-0013 : Command injection and information disclosure vulnerabilities
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from VMware Security Advisory 2019-0013. 
# The text itself is copyright (C) VMware Inc.
#

include("compat.inc");

if (description)
{
  script_id(128994);
  script_version("1.4");
  script_cvs_date("Date: 2019/12/27");

  script_cve_id("CVE-2017-16544", "CVE-2019-5531");
  script_xref(name:"VMSA", value:"2019-0013");
  script_xref(name:"IAVA", value:"2019-A-0344");

  script_name(english:"VMSA-2019-0013 : Command injection and information disclosure vulnerabilities");
  script_summary(english:"Checks esxupdate output for the patches");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote VMware ESXi host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"a. VMware ESXi busybox command injection vulnerability

ESXi contains a command injection vulnerability due to the use of vulnerable version of busybox that does not sanitize filenames which may result into executing any escape sequence in the shell.

An attacker may exploit this issue by tricking an ESXi Admin into executing shell commands by providing a malicious file. 

b. ESXi Host Client information disclosure vulnerability

An information disclosure vulnerability in clients arising from insufficient session expiration.

An attacker with physical access or an ability to mimic a websocket connection to a users browser may be able to obtain control of a VM Console after the user has logged out or their session has timed out."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://lists.vmware.com/pipermail/security-announce/2019/000467.html"
  );
  script_set_attribute(attribute:"solution", value:"Apply the missing patches.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:vmware:esxi:6.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:vmware:esxi:6.5");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:vmware:esxi:6.7");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/11/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/09/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/09/18");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"VMware ESX Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/VMware/release", "Host/VMware/version");
  script_require_ports("Host/VMware/esxupdate", "Host/VMware/esxcli_software_vibs");

  exit(0);
}


include("audit.inc");
include("vmware_esx_packages.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/VMware/release")) audit(AUDIT_OS_NOT, "VMware ESX / ESXi");
if (
  !get_kb_item("Host/VMware/esxcli_software_vibs") &&
  !get_kb_item("Host/VMware/esxupdate")
) audit(AUDIT_PACKAGE_LIST_MISSING);


init_esx_check(date:"2019-09-16");
flag = 0;


if (esx_check(ver:"ESXi 6.0", vib:"VMware:esx-base:6.0.0-3.125.14475122")) flag++;
if (esx_check(ver:"ESXi 6.0", vib:"VMware:esx-ui:1.30.0-9063842")) flag++;
if (esx_check(ver:"ESXi 6.0", vib:"VMware:vsan:6.0.0-3.125.14292904")) flag++;
if (esx_check(ver:"ESXi 6.0", vib:"VMware:vsanhealth:6.0.0-3000000.3.0.3.125.14292905")) flag++;

if (esx_check(ver:"ESXi 6.5", vib:"VMware:esx-base:6.5.0-3.96.13932383")) flag++;
if (esx_check(ver:"ESXi 6.5", vib:"VMware:esx-tboot:6.5.0-3.96.13932383")) flag++;
if (esx_check(ver:"ESXi 6.5", vib:"VMware:esx-ui:1.31.0-10201673")) flag++;
if (esx_check(ver:"ESXi 6.5", vib:"VMware:vsan:6.5.0-3.96.13371499")) flag++;
if (esx_check(ver:"ESXi 6.5", vib:"VMware:vsanhealth:6.5.0-3.96.13530496")) flag++;

if (esx_check(ver:"ESXi 6.7", vib:"VMware:esx-base:6.7.0-0.28.10176879")) flag++;
if (esx_check(ver:"ESXi 6.7", vib:"VMware:esx-base:6.7.0-1.44.12986307")) flag++;
if (esx_check(ver:"ESXi 6.7", vib:"VMware:esx-update:6.7.0-1.44.12986307")) flag++;
if (esx_check(ver:"ESXi 6.7", vib:"VMware:vsan:6.7.0-0.28.10176879")) flag++;
if (esx_check(ver:"ESXi 6.7", vib:"VMware:vsan:6.7.0-1.44.11399678")) flag++;
if (esx_check(ver:"ESXi 6.7", vib:"VMware:vsanhealth:6.7.0-0.28.10176879")) flag++;
if (esx_check(ver:"ESXi 6.7", vib:"VMware:vsanhealth:6.7.0-1.44.11399680")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:esx_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-201803-12.NASL
    descriptionThe remote host is affected by the vulnerability described in GLSA-201803-12 (BusyBox: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in BusyBox. Please review the CVE identifiers referenced below for details. Impact : A remote attacker could possibly execute arbitrary code with the privileges of the process, cause a Denial of Service condition, or have other unspecified impacts. Workaround : There is no known workaround at this time.
    last seen2020-06-01
    modified2020-06-02
    plugin id108627
    published2018-03-27
    reporterThis script is Copyright (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/108627
    titleGLSA-201803-12 : BusyBox: Multiple vulnerabilities
  • NASL familyMisc.
    NASL idVMWARE_ESXI_VMSA-2019-0013.NASL
    descriptionThe remote VMware ESXi host is version 6.0, 6.5 or 6.7 and is affected the following vulnerabilities: - A remote code execution vulnerability caused by a failure to sanitize filenames in the tab autocomplete feature of BusyBox. This allows an attacker to execute arbitrary code, write arbitrary files, or conduct other attacks. (CVE-2017-16544) - An information disclosure vulnerability caused by insufficient session expiration. This allows an attacker with physical access or the ability to mimic a websocket connection to a user
    last seen2020-06-01
    modified2020-06-02
    plugin id129493
    published2019-10-02
    reporterThis script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/129493
    titleESXi 6.0 / 6.5 / 6.7 Multiple Vulnerabilities (VMSA-2019-0013)
  • NASL familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-3935-1.NASL
    descriptionTyler Hicks discovered that BusyBox incorrectly handled symlinks inside tar archives. If a user or automated system were tricked into processing a specially crafted tar archive, a remote attacker could overwrite arbitrary files outside of the current directory. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2011-5325) Mathias Krause discovered that BusyBox incorrectly handled kernel module loading restrictions. A local attacker could possibly use this issue to bypass intended restrictions. This issue only affected Ubuntu 14.04 LTS. (CVE-2014-9645) It was discovered that BusyBox incorrectly handled certain ZIP archives. If a user or automated system were tricked into processing a specially crafted ZIP archive, a remote attacker could cause BusyBox to crash, leading to a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2015-9261) Nico Golde discovered that the BusyBox DHCP client incorrectly handled certain malformed domain names. A remote attacker could possibly use this issue to cause the DHCP client to crash, leading to a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-2147) Nico Golde discovered that the BusyBox DHCP client incorrectly handled certain 6RD options. A remote attacker could use this issue to cause the DHCP client to crash, leading to a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-2148) It was discovered that BusyBox incorrectly handled certain bzip2 archives. If a user or automated system were tricked into processing a specially crafted bzip2 archive, a remote attacker could cause BusyBox to crash, leading to a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2017-15873) It was discovered that BusyBox incorrectly handled tab completion. A local attacker could possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2017-16544) It was discovered that the BusyBox wget utility incorrectly handled certain responses. A remote attacker could use this issue to cause BusyBox to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2018-1000517) It was discovered that the BusyBox DHCP utilities incorrectly handled certain memory operations. A remote attacker could possibly use this issue to access sensitive information. (CVE-2018-20679, CVE-2019-5747). 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 id123751
    published2019-04-04
    reporterUbuntu Security Notice (C) 2019 Canonical, Inc. / NASL script (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/123751
    titleUbuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 18.10 : busybox vulnerabilities (USN-3935-1)

Packetstorm

References