Vulnerabilities > CVE-2020-8896 - Classic Buffer Overflow vulnerability in Google Earth

047910
CVSS 5.9 - MEDIUM
Attack vector
NETWORK
Attack complexity
HIGH
Privileges required
NONE
Confidentiality impact
HIGH
Integrity impact
NONE
Availability impact
NONE
network
high complexity
google
CWE-120
nessus

Summary

A Buffer Overflow vulnerability in the khcrypt implementation in Google Earth Pro versions up to and including 7.3.2 allows an attacker to perform a Man-in-the-Middle attack using a specially crafted key to read data past the end of the buffer used to hold it. Mitigation: Update to Google Earth Pro 7.3.3.

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.

Nessus

NASL familyWindows
NASL idGOOGLE_EARTH_CVE-2020-8895.NASL
descriptionThe version of Google Earth Pro installed on the remote host is prior to 7.3.3. It is, therefore, affected by the following vulnerabilities : - A DLL hijacking vulnerability exists in the Windows installer due to the use of an untrusted search path. An unauthenticated, local attacker can exploit this, via inserting a malicious file, to bypass authentication and execute arbitrary code. (CVE-2020-8895) - A buffer overflow condition exists in khcrypt implementation. An unauthenticated, adjacent attacker can exploit this, via a specially crafted key, to execute a MitM attack. (CVE-2020-8896) Note that Nessus has not tested for this issue but has instead relied only on the application
last seen2020-05-06
modified2020-05-01
plugin id136192
published2020-05-01
reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/136192
titleGoogle Earth Pro < 7.3.3 Multiple Vulnerabilities
code
#
# (C) Tenable Network Security, Inc.
#

include('compat.inc');

if (description)
{
  script_id(136192);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/04");

  script_cve_id("CVE-2020-8895", "CVE-2020-8896");
  script_xref(name:"IAVA", value:"2020-A-0179");

  script_name(english:"Google Earth Pro < 7.3.3 Multiple Vulnerabilities");

  script_set_attribute(attribute:"synopsis", value:
"The Google Earth Pro installed on the remote host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of Google Earth Pro installed on the remote host is prior to 7.3.3. It is, therefore, affected by
the following vulnerabilities :

  - A DLL hijacking vulnerability exists in the Windows installer due to the use of an untrusted search path.
    An unauthenticated, local attacker can exploit this, via inserting a malicious file, to bypass
    authentication and execute arbitrary code. (CVE-2020-8895)

  - A buffer overflow condition exists in khcrypt implementation. An unauthenticated, adjacent attacker can
    exploit this, via a specially crafted key, to execute a MitM attack. (CVE-2020-8896)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://support.google.com/earth/answer/40901");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Google Earth Pro version 7.3.3 or later.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-8895");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/04/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/04/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/01");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:google:earth");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Windows");

  script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("google_earth_detect_win.nbin");
  script_require_keys("installed_sw/Google Earth Pro");

  exit(0);
}

include('vcf.inc');

app_info = vcf::get_app_info(app:'Google Earth Pro');

constraints = [
  { 'fixed_version' : '7.3.3' }
];

vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_WARNING);