Vulnerabilities > CVE-2020-6477 - Link Following vulnerability in multiple products
Attack vector
LOCAL Attack complexity
LOW Privileges required
LOW Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
Inappropriate implementation in installer in Google Chrome on OS X prior to 83.0.4103.61 allowed a local attacker to perform privilege escalation via a crafted file.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Symlink Attack An attacker positions a symbolic link in such a manner that the targeted user or application accesses the link's endpoint, assuming that it is accessing a file with the link's name. The endpoint file may be either output or input. If the file is output, the result is that the endpoint is modified, instead of a file at the intended location. Modifications to the endpoint file may include appending, overwriting, corrupting, changing permissions, or other modifications. In some variants of this attack the attacker may be able to control the change to a file while in other cases they cannot. The former is especially damaging since the attacker may be able to grant themselves increased privileges or insert false information, but the latter can also be damaging as it can expose sensitive information or corrupt or destroy vital system or application files. Alternatively, the endpoint file may serve as input to the targeted application. This can be used to feed malformed input into the target or to cause the target to process different information, possibly allowing the attacker to control the actions of the target or to cause the target to expose information to the attacker. Moreover, the actions taken on the endpoint file are undertaken with the permissions of the targeted user or application, which may exceed the permissions that the attacker would normally have.
- Accessing, Modifying or Executing Executable Files An attack of this type exploits a system's configuration that allows an attacker to either directly access an executable file, for example through shell access; or in a possible worst case allows an attacker to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.
- 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 Input to File System Calls An attacker manipulates inputs to the target software which the target software passes to file system calls in the OS. The goal is to gain access to, and perhaps modify, areas of the file system that the target software did not intend to be accessible.
Nessus
NASL family FreeBSD Local Security Checks NASL id FREEBSD_PKG_38C676BD9DEF11EAA94C3065EC8FD3EC.NASL description Google Chrome Releases reports : This release includes 38 security fixes, including CVEs CVE-2020-6465 through CVE-2020-6491. last seen 2020-05-31 modified 2020-05-26 plugin id 136849 published 2020-05-26 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/136849 title FreeBSD : chromium -- multiple vulnerabilities (38c676bd-9def-11ea-a94c-3065ec8fd3ec) code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from the FreeBSD VuXML database : # # Copyright 2003-2020 Jacques Vidrine and contributors # # Redistribution and use in source (VuXML) and 'compiled' forms (SGML, # HTML, PDF, PostScript, RTF and so forth) with or without modification, # are permitted provided that the following conditions are met: # 1. Redistributions of source code (VuXML) must retain the above # copyright notice, this list of conditions and the following # disclaimer as the first lines of this file unmodified. # 2. Redistributions in compiled form (transformed to other DTDs, # published online in any format, converted to PDF, PostScript, # RTF and other formats) must reproduce the above copyright # notice, this list of conditions and the following disclaimer # in the documentation and/or other materials provided with the # distribution. # # THIS DOCUMENTATION IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, # THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS # BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, # OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT # OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR # BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, # WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE # OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS DOCUMENTATION, # EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. # include("compat.inc"); if (description) { script_id(136849); script_version("1.2"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/28"); script_cve_id("CVE-2020-6465", "CVE-2020-6466", "CVE-2020-6467", "CVE-2020-6468", "CVE-2020-6469", "CVE-2020-6470", "CVE-2020-6471", "CVE-2020-6472", "CVE-2020-6473", "CVE-2020-6474", "CVE-2020-6475", "CVE-2020-6476", "CVE-2020-6477", "CVE-2020-6478", "CVE-2020-6479", "CVE-2020-6480", "CVE-2020-6481", "CVE-2020-6482", "CVE-2020-6483", "CVE-2020-6484", "CVE-2020-6485", "CVE-2020-6486", "CVE-2020-6487", "CVE-2020-6488", "CVE-2020-6489", "CVE-2020-6490", "CVE-2020-6491"); script_name(english:"FreeBSD : chromium -- multiple vulnerabilities (38c676bd-9def-11ea-a94c-3065ec8fd3ec)"); script_summary(english:"Checks for updated package in pkg_info output"); script_set_attribute( attribute:"synopsis", value:"The remote FreeBSD host is missing a security-related update." ); script_set_attribute( attribute:"description", value: "Google Chrome Releases reports : This release includes 38 security fixes, including CVEs CVE-2020-6465 through CVE-2020-6491." ); # https://chromereleases.googleblog.com/2020/05/stable-channel-update-for-desktop_19.html script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?26bb137e" ); # https://vuxml.freebsd.org/freebsd/38c676bd-9def-11ea-a94c-3065ec8fd3ec.html script_set_attribute( attribute:"see_also", value:"http://www.nessus.org/u?709276be" ); script_set_attribute(attribute:"solution", value:"Update the affected package."); script_set_cvss_base_vector("CVSS2#AV:N/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:N/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-2020-6477"); 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:freebsd:freebsd:chromium"); script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd"); script_set_attribute(attribute:"vuln_publication_date", value:"2020/05/19"); script_set_attribute(attribute:"patch_publication_date", value:"2020/05/24"); script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/26"); script_set_attribute(attribute:"generated_plugin", value:"current"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_family(english:"FreeBSD Local Security Checks"); script_dependencies("ssh_get_info.nasl"); script_require_keys("Host/local_checks_enabled", "Host/FreeBSD/release", "Host/FreeBSD/pkg_info"); exit(0); } include("audit.inc"); include("freebsd_package.inc"); if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED); if (!get_kb_item("Host/FreeBSD/release")) audit(AUDIT_OS_NOT, "FreeBSD"); if (!get_kb_item("Host/FreeBSD/pkg_info")) audit(AUDIT_PACKAGE_LIST_MISSING); flag = 0; if (pkg_test(save_report:TRUE, pkg:"chromium<83.0.4103.61")) flag++; if (flag) { if (report_verbosity > 0) security_warning(port:0, extra:pkg_report_get()); else security_warning(0); exit(0); } else audit(AUDIT_HOST_NOT, "affected");NASL family MacOS X Local Security Checks NASL id MACOSX_GOOGLE_CHROME_83_0_4103_61.NASL description The version of Google Chrome installed on the remote macOS host is prior to 83.0.4103.61. It is, therefore, affected by multiple vulnerabilities as referenced in the 2020_05_stable-channel-update-for-desktop_19 advisory. Note that Nessus has not tested for this issue but has instead relied only on the application last seen 2020-06-06 modified 2020-05-21 plugin id 136742 published 2020-05-21 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/136742 title Google Chrome < 83.0.4103.61 Multiple Vulnerabilities code # # (C) Tenable Network Security, Inc. # include('compat.inc'); if (description) { script_id(136742); script_version("1.4"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/05"); script_cve_id( "CVE-2020-6465", "CVE-2020-6466", "CVE-2020-6467", "CVE-2020-6468", "CVE-2020-6469", "CVE-2020-6470", "CVE-2020-6471", "CVE-2020-6472", "CVE-2020-6473", "CVE-2020-6474", "CVE-2020-6475", "CVE-2020-6476", "CVE-2020-6477", "CVE-2020-6478", "CVE-2020-6479", "CVE-2020-6480", "CVE-2020-6481", "CVE-2020-6482", "CVE-2020-6483", "CVE-2020-6484", "CVE-2020-6485", "CVE-2020-6486", "CVE-2020-6487", "CVE-2020-6488", "CVE-2020-6489", "CVE-2020-6490", "CVE-2020-6491" ); script_xref(name:"IAVA", value:"2020-A-0220-S"); script_name(english:"Google Chrome < 83.0.4103.61 Multiple Vulnerabilities"); script_set_attribute(attribute:"synopsis", value: "A web browser installed on the remote macOS host is affected by multiple vulnerabilities."); script_set_attribute(attribute:"description", value: "The version of Google Chrome installed on the remote macOS host is prior to 83.0.4103.61. It is, therefore, affected by multiple vulnerabilities as referenced in the 2020_05_stable-channel-update-for-desktop_19 advisory. Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number."); # https://chromereleases.googleblog.com/2020/05/stable-channel-update-for-desktop_19.html script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?26bb137e"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1073015"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1074706"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1068084"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1076708"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1067382"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1065761"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1059577"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1064519"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1049510"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1059533"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1020026"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1035315"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/946156"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1037730"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1041749"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1054966"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1068531"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/795595"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/966507"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1045787"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1047285"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1055524"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/539938"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1044277"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1050756"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1035887"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1050011"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1084009"); script_set_attribute(attribute:"solution", value: "Upgrade to Google Chrome version 83.0.4103.61 or later."); script_set_cvss_base_vector("CVSS2#AV:N/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:N/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-2020-6465"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"vuln_publication_date", value:"2020/05/19"); script_set_attribute(attribute:"patch_publication_date", value:"2020/05/19"); script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/21"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"cpe:/a:google:chrome"); script_set_attribute(attribute:"stig_severity", value:"II"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_family(english:"MacOS X Local Security Checks"); script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof."); script_dependencies("macosx_google_chrome_installed.nbin"); script_require_keys("MacOSX/Google Chrome/Installed"); exit(0); } include('google_chrome_version.inc'); get_kb_item_or_exit('MacOSX/Google Chrome/Installed'); google_chrome_check_version(fix:'83.0.4103.61', severity:SECURITY_WARNING, xss:FALSE, xsrf:FALSE);NASL family Windows NASL id GOOGLE_CHROME_83_0_4103_61.NASL description The version of Google Chrome installed on the remote Windows host is prior to 83.0.4103.61. It is, therefore, affected by multiple vulnerabilities as referenced in the 2020_05_stable-channel-update-for-desktop_19 advisory. Note that Nessus has not tested for this issue but has instead relied only on the application last seen 2020-06-06 modified 2020-05-21 plugin id 136743 published 2020-05-21 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/136743 title Google Chrome < 83.0.4103.61 Multiple Vulnerabilities code # # (C) Tenable Network Security, Inc. # include('compat.inc'); if (description) { script_id(136743); script_version("1.4"); script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/05"); script_cve_id( "CVE-2020-6465", "CVE-2020-6466", "CVE-2020-6467", "CVE-2020-6468", "CVE-2020-6469", "CVE-2020-6470", "CVE-2020-6471", "CVE-2020-6472", "CVE-2020-6473", "CVE-2020-6474", "CVE-2020-6475", "CVE-2020-6476", "CVE-2020-6477", "CVE-2020-6478", "CVE-2020-6479", "CVE-2020-6480", "CVE-2020-6481", "CVE-2020-6482", "CVE-2020-6483", "CVE-2020-6484", "CVE-2020-6485", "CVE-2020-6486", "CVE-2020-6487", "CVE-2020-6488", "CVE-2020-6489", "CVE-2020-6490", "CVE-2020-6491" ); script_xref(name:"IAVA", value:"2020-A-0220-S"); script_name(english:"Google Chrome < 83.0.4103.61 Multiple Vulnerabilities"); script_set_attribute(attribute:"synopsis", value: "A web browser installed on the remote Windows host is affected by multiple vulnerabilities."); script_set_attribute(attribute:"description", value: "The version of Google Chrome installed on the remote Windows host is prior to 83.0.4103.61. It is, therefore, affected by multiple vulnerabilities as referenced in the 2020_05_stable-channel-update-for-desktop_19 advisory. Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number."); # https://chromereleases.googleblog.com/2020/05/stable-channel-update-for-desktop_19.html script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?26bb137e"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1073015"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1074706"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1068084"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1076708"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1067382"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1065761"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1059577"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1064519"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1049510"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1059533"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1020026"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1035315"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/946156"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1037730"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1041749"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1054966"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1068531"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/795595"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/966507"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1045787"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1047285"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1055524"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/539938"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1044277"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1050756"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1035887"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1050011"); script_set_attribute(attribute:"see_also", value:"https://crbug.com/1084009"); script_set_attribute(attribute:"solution", value: "Upgrade to Google Chrome version 83.0.4103.61 or later."); script_set_cvss_base_vector("CVSS2#AV:N/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:N/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-2020-6465"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"vuln_publication_date", value:"2020/05/19"); script_set_attribute(attribute:"patch_publication_date", value:"2020/05/19"); script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/21"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"cpe:/a:google:chrome"); script_set_attribute(attribute:"stig_severity", value:"II"); 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_chrome_installed.nasl"); script_require_keys("SMB/Google_Chrome/Installed"); exit(0); } include('google_chrome_version.inc'); get_kb_item_or_exit('SMB/Google_Chrome/Installed'); installs = get_kb_list('SMB/Google_Chrome/*'); google_chrome_check_version(installs:installs, fix:'83.0.4103.61', severity:SECURITY_WARNING, xss:FALSE, xsrf:FALSE);
References
- https://crbug.com/946156
- https://chromereleases.googleblog.com/2020/05/stable-channel-update-for-desktop_19.html
- https://security.gentoo.org/glsa/202006-02
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00034.html
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00038.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OQYH5OK7O4BU6E37WWG5SEEHV65BFSGR/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WLFZ5N4EK6I4ZJP5YSKLLVN3ELXEB4XT/