It was discovered that missing input sanitising in python-nbxmpp, a
Jabber/XMPP Python library, could result in denial of service in clients
based on it (such as Gajim).

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Multiple vulnerabilities have been discovered in Apple Products, the most severe of which could allow for arbitrary code execution.

iOS is a mobile operating system for mobile devices, including the iPhone, iPad, and iPod touch.
iPadOS is the successor to iOS 12 and is a mobile operating system for iPads.
macOS Monterey is the 18th and current major release of macOS.
macOS Big Sur is the 17th release of macOS.
macOS Catalina is the 16th major release of macOS
watchOS is the mobile operating system for Apple Watch and is based on the iOS operating system.
tvOS is an operating system for fourth-generation Apple TV digital media player.
Safari is a graphical web browser developed by Apple.

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FortiGuard Labs is aware that VMware disclosed a critical vulnerability (CVE-2021-22005) on September 21st, 2021 that affects vCenter Server versions 6.7 and 7.0. A malicious attacker with network access to port 443 on vCenter Server can exploit the vulnerability and can execute code on vCenter Server upon successful exploitation. The VMware advisory was updated on September 24th that the vulnerability is being exploited in the wild. In addition, exploit code is publicly available.Why is this Significant?VMware has one of the highest market shares in the server virtualization market so the vulnerability can have widespread affect. Also, some public reports indicate that CVE-2021-22005 is being exploited in the wild. With exploit code being publicly available, more attackers are expected to leverage the security bug. Because of the potential impact the vulnerability has in the field, CISA released an advisory on September 24th, 2021.What are the Details of the Vulnerability?Details of the vulnerability have not been disclosed by VMware.Has VMware Released an Advisory for CVE-2021-22005?Yes, the vendor released a cumulative advisory on September 21st, 2021. See the Appendix for a link to VMSA-2021-0020.1. The vendor also released a supplemental blog post and an advisory. See the Appendix to a link to “VMSA-2021-0020: What You Need to Know” and “VMSA-2021-0020: Questions & Answers”.Has the Vendor Released a Patch?Yes. VMware released a patch on September 21st, 2021.Any Mitigation and or Workarounds?VMware provided workarounds in a blog. See the Appendix to a link to “Workaround Instructions for CVE-2021-22005 (85717)”.What is The Status of Coverage?FortiGuard Labs is investigating for IPS protection. This Threat Signal will be updated with protection information as it becomes available.

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On September 16th, the Cybersecurity and Infrastructure Security Agency (CISA), the Federal Bureau of Investigation (FBI), and United States Coast Guard Cyber Command (CGCYBER) released a new joint advisory titled – Alert (AA21-259A) APT Actors Exploiting Newly Identified Vulnerability in ManageEngine ADSelfService Plus. Zoho ManageEngine ADSelfService Plus version 6113 and prior is vulnerable to a REST API authentication bypass, which ultimately allows for remote code execution. The vulnerability has been assigned CVE-2021-40539.What Are the Technical Details of the Vulnerability?An authentication bypass vulnerability exists in Zoho ManageEngine ADSelfService Plus version 6113 and prior. Remote code execution is possible via affected REST API URL(s) that could allow for remote code execution. Successful exploitation of the vulnerability allows an attacker to place webshells within the victim environment. Once inside the victim environment, an adversary can conduct the following – Lateral movement, compromising administrator credentials, post exploitation, and exfiltrating registry hives and Active Directory files from a domain controller.Is this Being Exploited in the Wild?Yes. According to US-CERT, this is limited to targeted attacks by a sophisticated unnamed APT group.What Verticals are Being Targeted?According to the US-CERT alert, the following list of verticals have been observed to be targeted – academic institutions, defense contractors, and critical infrastructure entities in multiple industry sectors including transportation, IT, manufacturing, communications, logistics, and finance. What is the CVSS score?9.8 CRITICALHas the Vendor Issued a Patch?Yes, patches were released on September 6th, 2021 by the vendor. Please refer to the APPENDIX “ADSelfService Plus 6114 Security Fix Release” for details.What is the Status of Coverage? FortiGuard Labs provides the following IPS signature for CVE-2021-40539:Zoho.ManageEngine.ADSelfService.Plus.Authentication.BypassAny Mitigation and or Workarounds?It is strongly recommended to update to ADSelfService Plus build 6114. This update is located on the vendor homepage “ADSelfService Plus 6114 Security Fix Release” within the APPENDIX. It is also highly suggested to keep all affected devices from being publicly accessible or being placed behind a physical security appliance/firewall, such as a FortiGate. For further mitigation and workarounds, please refer to the US-CERT Alert and the Zoho Advisory in the APPENDIX.

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A vulnerability in Polkit’s pkexec component could allow for local privilege escalation. Polkit (formerly PolicyKit) is a component for controlling system-wide privileges in Unix-like operating systems. It provides an organized way for non-privileged processes to communicate with privileged ones. Polkit is installed by default on all major Linux distributions. Successful exploitation of this vulnerability could result in privilege escalation to root privileges.

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Two vulnerabilities were discovered in uriparser, a library that parses
Uniform Resource Identifiers (URIs), which may result in denial of
service or potentially in the execution of arbitrary code.

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A vulnerability has been discovered in F5Networks BIG-IP, which could result in a denial-of-service (DoS). BIG-IP is a family of products covering software and hardware designed around application availability, access control, and security solutions. Successful exploitation of this vulnerability could allow an attacker to cause a denial of service to all servers sitting behind the BIG-IP system.

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Tavis Ormandy discovered that incorrect parsing of pkcs7 sequences in
nss, the Mozilla Network Security Service library, may result in denial
of service.

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The following vulnerabilities have been discovered in the wpewebkit
web engine:

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