Vulnerabilities > CVE-2019-5519 - Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability in VMWare Esxi, Fusion and Workstation
Attack vector
PHYSICAL Attack complexity
LOW Privileges required
NONE Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
VMware ESXi (6.7 before ESXi670-201903001, 6.5 before ESXi650-201903001, 6.0 before ESXi600-201903001), Workstation (15.x before 15.0.4, 14.x before 14.1.7), Fusion (11.x before 11.0.3, 10.x before 10.1.6) contain a Time-of-check Time-of-use (TOCTOU) vulnerability in the virtual USB 1.1 UHCI (Universal Host Controller Interface). Exploitation of this issue requires an attacker to have access to a virtual machine with a virtual USB controller present. This issue may allow a guest to execute code on the host.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Leveraging Race Conditions via Symbolic Links This attack leverages the use of symbolic links (Symlinks) in order to write to sensitive files. An attacker can create a Symlink link to a target file not otherwise accessible to her. When the privileged program tries to create a temporary file with the same name as the Symlink link, it will actually write to the target file pointed to by the attackers' Symlink link. If the attacker can insert malicious content in the temporary file she will be writing to the sensitive file by using the Symlink. The race occurs because the system checks if the temporary file exists, then creates the file. The attacker would typically create the Symlink during the interval between the check and the creation of the temporary file.
- Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions This attack targets a race condition occurring between the time of check (state) for a resource and the time of use of a resource. The typical example is the file access. The attacker can leverage a file access race condition by "running the race", meaning that he would modify the resource between the first time the target program accesses the file and the time the target program uses the file. During that period of time, the attacker could do something such as replace the file and cause an escalation of privilege.
Nessus
NASL family VMware ESX Local Security Checks NASL id VMWARE_VMSA-2019-0005.NASL description a. VMware ESXi, Workstation and Fusion UHCI out-of-bounds read/write and TOCTOU vulnerabilities VMware ESXi, Workstation and Fusion contain an out-of-bounds read/write vulnerability and a Time-of-check Time-of-use (TOCTOU) vulnerability in the virtual USB 1.1 UHCI (Universal Host Controller Interface). Exploitation of these issues requires an attacker to have access to a virtual machine with a virtual USB controller present. These issues may allow a guest to execute code on the host. VMware would like to thank the Fluoroacetate team of Amat Cama and Richard Zhu, working with the Pwn2Own 2019 Security Contest, for reporting these issues to us. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the identifiers CVE-2019-5518 (out-of-bounds read/write) and CVE-2019-5519 (TOCTOU) to these issues. b. VMware Workstation and Fusion out-of-bounds write vulnerability in e1000 virtual network adapter VMware Workstation and Fusion contain an out-of-bounds write vulnerability in the e1000 virtual network adapter. This issue may allow a guest to execute code on the host. VMware would like to thank security researcher Zhangyanyu of Chaitin Tech for reporting this issue to us. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the identifier CVE-2019-5524 to this issue. c. VMware Workstation and Fusion out-of-bounds write vulnerability in e1000 and e1000e virtual network adapters VMware Workstation and Fusion updates address an out-of-bounds write vulnerability in the e1000 and e1000e virtual network adapters. Exploitation of this issue may lead to code execution on the host from the guest but it is more likely to result in a denial of service of the guest. VMware would like to thank ZhanluLab working with Trend Micro last seen 2020-06-01 modified 2020-06-02 plugin id 123556 published 2019-04-01 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123556 title VMSA-2019-0005 : VMware ESXi, Workstation and Fusion updates address multiple security issues code # # (C) Tenable Network Security, Inc. # # The descriptive text and package checks in this plugin were # extracted from VMware Security Advisory 2019-0005. # The text itself is copyright (C) VMware Inc. # include("compat.inc"); if (description) { script_id(123556); script_version("1.4"); script_cvs_date("Date: 2020/01/27"); script_cve_id("CVE-2019-5514", "CVE-2019-5515", "CVE-2019-5518", "CVE-2019-5519", "CVE-2019-5524"); script_xref(name:"VMSA", value:"2019-0005"); script_xref(name:"IAVA", value:"2019-A-0099"); script_name(english:"VMSA-2019-0005 : VMware ESXi, Workstation and Fusion updates address multiple security issues"); 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, Workstation and Fusion UHCI out-of-bounds read/write and TOCTOU vulnerabilities VMware ESXi, Workstation and Fusion contain an out-of-bounds read/write vulnerability and a Time-of-check Time-of-use (TOCTOU) vulnerability in the virtual USB 1.1 UHCI (Universal Host Controller Interface). Exploitation of these issues requires an attacker to have access to a virtual machine with a virtual USB controller present. These issues may allow a guest to execute code on the host. VMware would like to thank the Fluoroacetate team of Amat Cama and Richard Zhu, working with the Pwn2Own 2019 Security Contest, for reporting these issues to us. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the identifiers CVE-2019-5518 (out-of-bounds read/write) and CVE-2019-5519 (TOCTOU) to these issues. b. VMware Workstation and Fusion out-of-bounds write vulnerability in e1000 virtual network adapter VMware Workstation and Fusion contain an out-of-bounds write vulnerability in the e1000 virtual network adapter. This issue may allow a guest to execute code on the host. VMware would like to thank security researcher Zhangyanyu of Chaitin Tech for reporting this issue to us. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the identifier CVE-2019-5524 to this issue. c. VMware Workstation and Fusion out-of-bounds write vulnerability in e1000 and e1000e virtual network adapters VMware Workstation and Fusion updates address an out-of-bounds write vulnerability in the e1000 and e1000e virtual network adapters. Exploitation of this issue may lead to code execution on the host from the guest but it is more likely to result in a denial of service of the guest. VMware would like to thank ZhanluLab working with Trend Micro's Zero Day Initiative for reporting this issue to us. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the identifier CVE-2019-5515 to this issue. d. VMware Fusion unauthenticated APIs Security vulnerability VMware Fusion contains a security vulnerability due to certain unauthenticated APIs accessible through a web socket. An attacker may exploit this issue by tricking the host user to execute a JavaScript to perform unauthorized functions on the guest machine where VMware Tools is installed. This may further be exploited to execute commands on the guest machines. VMware would like to thank CodeColorist (@CodeColorist) and Csaba Fitzl (@theevilbit) for independently reporting this issue to us. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the identifier CVE-2019-5514 to this issue." ); script_set_attribute( attribute:"see_also", value:"http://lists.vmware.com/pipermail/security-announce/2019/000454.html" ); script_set_attribute(attribute:"solution", value:"Apply the missing patches."); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C"); 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:L/UI:N/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-2019-5524"); 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:"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:"2019/04/01"); script_set_attribute(attribute:"patch_publication_date", value:"2019/03/28"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/04/01"); 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) 2019-2020 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:"2019-03-28"); flag = 0; if (esx_check(ver:"ESXi 6.0", vib:"VMware:esx-base:6.0.0-3.113.13003896")) flag++; if (esx_check(ver:"ESXi 6.0", vib:"VMware:vsan:6.0.0-3.113.12980971")) flag++; if (esx_check(ver:"ESXi 6.0", vib:"VMware:vsanhealth:6.0.0-3000000.3.0.3.113.12980972")) flag++; if (esx_check(ver:"ESXi 6.5", vib:"VMware:esx-base:6.5.0-2.83.13004031")) flag++; if (esx_check(ver:"ESXi 6.5", vib:"VMware:esx-tboot:6.5.0-2.83.13004031")) flag++; if (esx_check(ver:"ESXi 6.5", vib:"VMware:vsan:6.5.0-2.83.12559347")) flag++; if (esx_check(ver:"ESXi 6.5", vib:"VMware:vsanhealth:6.5.0-2.83.12559353")) flag++; if (esx_check(ver:"ESXi 6.7", vib:"VMware:esx-base:6.7.0-1.41.13004448")) flag++; if (esx_check(ver:"ESXi 6.7", vib:"VMware:esx-update:6.7.0-1.41.13004448")) flag++; if (esx_check(ver:"ESXi 6.7", vib:"VMware:vsan:6.7.0-1.41.12909115")) flag++; if (esx_check(ver:"ESXi 6.7", vib:"VMware:vsanhealth:6.7.0-1.41.12909116")) flag++; if (flag) { if (report_verbosity > 0) security_hole(port:0, extra:esx_report_get()); else security_hole(0); exit(0); } else audit(AUDIT_HOST_NOT, "affected");
NASL family General NASL id VMWARE_WORKSTATION_VMSA_2019_0005.NASL description The version of VMware Workstation installed on the remote host is 14.x prior to 14.1.4 or 15.x prior to 15.0.1. It is, therefore, affected by multiple vulnerabilities, including: - An out-of-bounds read/write vulnerability and a Time-of-check Time-of-use (TOCTOU) vulnerability in the virtual USB 1.1 UHCI (Universal Host Controller Interface). Exploitation of these issues requires an attacker to have access to a virtual machine with a virtual USB controller present. These issues may allow a guest to execute code on the host. (CVE-2019-5518, CVE-2019-5519) - An out-of-bounds write vulnerability in the e1000 virtual network adapter. This issue may allow a guest to execute code on the host. (CVE-2019-5524) - An out-of-bounds write vulnerability in the e1000 and e1000e virtual network adapters. Exploitation of this issue may lead to code execution on the host from the guest but it is more likely to result in a denial of service of the guest. (CVE-2019-5515) Note that CVE-2019-5524 only applies to VMware Workstation 14.x and was fixed in 14.1.6. Note that CVE-2019-5515 was fixed in 14.1.6 and 15.0.3. last seen 2020-06-01 modified 2020-06-02 plugin id 123516 published 2019-03-29 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123516 title VMware Workstation 14.x < 14.1.7 / 15.x < 15.0.4 Multiple Vulnerabilities (VMSA-2019-0005) code # # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(123516); script_version("1.3"); script_cvs_date("Date: 2019/10/30 13:24:46"); script_cve_id( "CVE-2019-5515", "CVE-2019-5518", "CVE-2019-5519", "CVE-2019-5524" ); script_xref(name:"VMSA", value:"2019-0005"); script_xref(name:"IAVA", value:"2019-A-0099"); script_name(english:"VMware Workstation 14.x < 14.1.7 / 15.x < 15.0.4 Multiple Vulnerabilities (VMSA-2019-0005)"); script_summary(english:"Checks the VMware Workstation version."); script_set_attribute(attribute:"synopsis", value: "A virtualization application installed on the remote Windows host is affected by an uninitialized stack memory usage vulnerability."); script_set_attribute(attribute:"description", value: "The version of VMware Workstation installed on the remote host is 14.x prior to 14.1.4 or 15.x prior to 15.0.1. It is, therefore, affected by multiple vulnerabilities, including: - An out-of-bounds read/write vulnerability and a Time-of-check Time-of-use (TOCTOU) vulnerability in the virtual USB 1.1 UHCI (Universal Host Controller Interface). Exploitation of these issues requires an attacker to have access to a virtual machine with a virtual USB controller present. These issues may allow a guest to execute code on the host. (CVE-2019-5518, CVE-2019-5519) - An out-of-bounds write vulnerability in the e1000 virtual network adapter. This issue may allow a guest to execute code on the host. (CVE-2019-5524) - An out-of-bounds write vulnerability in the e1000 and e1000e virtual network adapters. Exploitation of this issue may lead to code execution on the host from the guest but it is more likely to result in a denial of service of the guest. (CVE-2019-5515) Note that CVE-2019-5524 only applies to VMware Workstation 14.x and was fixed in 14.1.6. Note that CVE-2019-5515 was fixed in 14.1.6 and 15.0.3."); script_set_attribute(attribute:"see_also", value:"https://www.vmware.com/security/advisories/VMSA-2019-0005.html"); script_set_attribute(attribute:"solution", value: "Upgrade to VMware Workstation version 14.1.7, 15.0.4, or later."); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C"); 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:L/UI:N/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-2019-5524"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/28"); script_set_attribute(attribute:"patch_publication_date", value:"2019/03/28"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/03/29"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"cpe:/a:vmware:workstation"); script_set_attribute(attribute:"stig_severity", value:"I"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_family(english:"General"); script_copyright(english:"This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_dependencies("vmware_workstation_detect.nasl", "vmware_workstation_linux_installed.nbin"); script_require_keys("installed_sw/VMware Workstation"); exit(0); } include("vcf.inc"); if (get_kb_item("SMB/Registry/Enumerated")) win_local = TRUE; app_info = vcf::get_app_info(app:"VMware Workstation", win_local:win_local); vcf::check_granularity(app_info:app_info, sig_segments:2); constraints = [ { "min_version" : "14", "fixed_version" : "14.1.7" }, { "min_version" : "15", "fixed_version" : "15.0.4" } ]; vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_HOLE);
NASL family MacOS X Local Security Checks NASL id MACOSX_FUSION_VMSA_2019_0005.NASL description The version of VMware Fusion installed on the remote macOS or Mac OS X host is 10.x prior to 10.1.6 or 11.x prior to 11.0.3. It is, therefore, affected by multiple vulnerabilities, including: - An out-of-bounds read/write vulnerability and a Time-of-check Time-of-use (TOCTOU) vulnerability in the virtual USB 1.1 UHCI (Universal Host Controller Interface). Exploitation of these issues requires an attacker to have access to a virtual machine with a virtual USB controller present. These issues may allow a guest to execute code on the host. (CVE-2019-5518, CVE-2019-5519) - An out-of-bounds write vulnerability in the e1000 virtual network adapter. This issue may allow a guest to execute code on the host. (CVE-2019-5524) - An out-of-bounds write vulnerability in the e1000 and e1000e virtual network adapters. Exploitation of this issue may lead to code execution on the host from the guest but it is more likely to result in a denial of service of the guest. (CVE-2019-5515) - A security vulnerability due to certain unauthenticated APIs accessible through a web socket. An attacker may exploit this issue by tricking the host user to execute a JavaScript to perform unauthorized functions on the guest machine where VMware Tools is installed. This may further be exploited to execute commands on the guest machines. (CVE-2019-5514) Note that CVE-2019-5524 only applies to VMware Fusion 10.x. Note that CVE-2019-5514 only applies to VMware Fusion 11.x last seen 2020-06-01 modified 2020-06-02 plugin id 123517 published 2019-03-29 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123517 title VMware Fusion 10.x < 10.1.6 / 11.x < 11.0.3 Multiple Vulnerabilities (VMSA-2019-0005) (macOS) code # # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(123517); script_version("1.3"); script_cvs_date("Date: 2019/10/30 13:24:46"); script_cve_id( "CVE-2019-5514", "CVE-2019-5515", "CVE-2019-5518", "CVE-2019-5519", "CVE-2019-5524" ); script_xref(name:"VMSA", value:"2019-0005"); script_xref(name:"IAVA", value:"2019-A-0099"); script_name(english:"VMware Fusion 10.x < 10.1.6 / 11.x < 11.0.3 Multiple Vulnerabilities (VMSA-2019-0005) (macOS)"); script_summary(english:"Checks the VMware Fusion version."); script_set_attribute(attribute:"synopsis", value: "A virtualization application installed on the remote macOS or Mac OS X host is affected by an uninitialized stack memory usage vulnerability."); script_set_attribute(attribute:"description", value: "The version of VMware Fusion installed on the remote macOS or Mac OS X host is 10.x prior to 10.1.6 or 11.x prior to 11.0.3. It is, therefore, affected by multiple vulnerabilities, including: - An out-of-bounds read/write vulnerability and a Time-of-check Time-of-use (TOCTOU) vulnerability in the virtual USB 1.1 UHCI (Universal Host Controller Interface). Exploitation of these issues requires an attacker to have access to a virtual machine with a virtual USB controller present. These issues may allow a guest to execute code on the host. (CVE-2019-5518, CVE-2019-5519) - An out-of-bounds write vulnerability in the e1000 virtual network adapter. This issue may allow a guest to execute code on the host. (CVE-2019-5524) - An out-of-bounds write vulnerability in the e1000 and e1000e virtual network adapters. Exploitation of this issue may lead to code execution on the host from the guest but it is more likely to result in a denial of service of the guest. (CVE-2019-5515) - A security vulnerability due to certain unauthenticated APIs accessible through a web socket. An attacker may exploit this issue by tricking the host user to execute a JavaScript to perform unauthorized functions on the guest machine where VMware Tools is installed. This may further be exploited to execute commands on the guest machines. (CVE-2019-5514) Note that CVE-2019-5524 only applies to VMware Fusion 10.x. Note that CVE-2019-5514 only applies to VMware Fusion 11.x"); script_set_attribute(attribute:"see_also", value:"https://www.vmware.com/security/advisories/VMSA-20189-0005.html"); script_set_attribute(attribute:"solution", value: "Upgrade to VMware Fusion version 10.1.6, 11.0.3, or later."); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C"); 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:L/UI:N/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-2019-5524"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"vuln_publication_date", value:"2019/03/28"); script_set_attribute(attribute:"patch_publication_date", value:"2019/03/28"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/03/29"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"cpe:/a:vmware:fusion"); script_set_attribute(attribute:"stig_severity", value:"I"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_family(english:"MacOS X Local Security Checks"); script_copyright(english:"This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_dependencies("macosx_fusion_detect.nasl"); script_require_keys("Host/local_checks_enabled", "installed_sw/VMware Fusion"); exit(0); } include("vcf.inc"); app_info = vcf::get_app_info(app:"VMware Fusion"); vcf::check_granularity(app_info:app_info, sig_segments:2); constraints = [ { "min_version" : "10", "fixed_version" : "10.1.6" }, { "min_version" : "11", "fixed_version" : "11.0.3" } ]; vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_HOLE);
NASL family Misc. NASL id VMWARE_ESXI_VMSA-2019-0005.NASL description The remote VMware ESXi host is version 6.0, 6.5, or 6.7 and is missing a security patch. It is, therefore, vulnerable to multiple vulnerabilities, including: - An out-of-bounds read/write vulnerability and a Time-of-check Time-of-use (TOCTOU) vulnerability in the virtual USB 1.1 UHCI (Universal Host Controller Interface). Exploitation of these issues requires an attacker to have access to a virtual machine with a virtual USB controller present. These issues may allow a guest to execute code on the host. (CVE-2019-5518, CVE-2019-5519) last seen 2020-06-01 modified 2020-06-02 plugin id 123518 published 2019-03-29 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/123518 title ESXi 6.0 / 6.5 / 6.7 Multiple Vulnerabilities (VMSA-2019-0005) (Remote Check)
References
- http://packetstormsecurity.com/files/152290/VMware-Security-Advisory-2019-0005.html
- http://packetstormsecurity.com/files/152290/VMware-Security-Advisory-2019-0005.html
- http://www.securityfocus.com/bid/107535
- http://www.securityfocus.com/bid/107535
- http://www.securityfocus.com/bid/108443
- http://www.securityfocus.com/bid/108443
- https://www.vmware.com/security/advisories/VMSA-2019-0005.html
- https://www.vmware.com/security/advisories/VMSA-2019-0005.html
- https://www.zerodayinitiative.com/advisories/ZDI-19-420/
- https://www.zerodayinitiative.com/advisories/ZDI-19-420/