Zoom Meetings

The Zoom Client for Meetings for Windows in all versions before 5.3.0 fails to properly validate the certificate information used to sign .msi files when performing an update of the client. This could lead to remote code execution in an elevated privileged context.

Buffer overflow in Zoom client and other products

Improper URL parsing in Zoom Clients

Improperly constrained session cookies in Zoom Client for Meetings

Update package downgrade in Zoom Client for Meetings for Windows

Improper authorization in some Zoom clients may allow an authorized user to conduct an escalation of privilege via network access.

Local Privilege Escalation in Zoom Client Installer for macOS

Local Privilege Escalation in Auto Updater for Zoom Client for Meetings for macOS

Local Privilege Escalation in Auto Updater for Zoom Client for Meetings for macOS

Local Privilege Escalation in Zoom Client for Meetings for MacOS

Improper XML Parsing in Zoom Client for Meetings

Local privilege escalation in Windows Zoom Clients

Zoom Chat Susceptible to Zip Bombing

DLL injection in Zoom Opener installer for Zoom and Zoom Rooms clients

The Zoom Client for Meetings for Windows in all versions before version 5.3.2 writes log files to a user writable directory as a privileged user during the installation or update of the client. This could allow for potential privilege escalation if a link was created between the user writable directory used and a non-user writable directory.

Zoom Client for Meetings through 4.6.8 on macOS copies runwithroot to a user-writable temporary directory during installation, which allows a local process (with the user's privileges) to obtain root access by replacing runwithroot.

During the installation process for all versions of the Zoom Client for Meetings for Windows before 5.4.0, it is possible to launch Internet Explorer. If the installer was launched with elevated privileges such as by SCCM this can result in a local privilege escalation.

Debugging port misconfiguration in Zoom Apps in the Zoom Client for Meetings for macOS

Local Privilege Escalation in Zoom for macOS Installers

Zoom Client Installer Local Privilege Escalation

Local Privilege Escalation in Zoom for Windows Installers

Insufficient hostname validation during Clusterswitch message in Zoom Client for Meetings

Process memory exposure in Zoom Client and other products

airhost.exe in Zoom Client for Meetings 4.6.11 uses the SHA-256 hash of 0123425234234fsdfsdr3242 for initialization of an OpenSSL EVP AES-256 CBC context. NOTE: the vendor states that this initialization only occurs within unreachable code

airhost.exe in Zoom Client for Meetings 4.6.11 uses 3423423432325249 as the Initialization Vector (IV) for AES-256 CBC encryption. NOTE: the vendor states that this IV is used only within unreachable code

Zoom Client for Meetings through 4.6.9 uses the ECB mode of AES for video and audio encryption. Within a meeting, all participants use a single 128-bit key.

Buffer overflow in some Zoom clients may allow an unauthenticated user to conduct a denial of service via network access.

Buffer overflow in some Zoom clients may allow an unauthenticated user to conduct a denial of service via network access.

Exposure of information intended to be encrypted by some Zoom clients may lead to disclosure of sensitive information.

Update package downgrade in Zoom Client for Meetings for MacOS

DLL injection in Zoom Windows Clients

Improper conditions check in Zoom Team Chat for Zoom clients may allow an authenticated user to conduct a denial of service via network access.

Insufficient control flow management in some Zoom clients may allow an authenticated user to conduct an information disclosure via network access.

Cryptographic issues with In-Meeting Chat for some Zoom clients may allow a privileged user to conduct an information disclosure via network access.

Server Side Request Forgery in Zoom Client for Meetings chat

Zoom Client for Meetings through 4.6.8 on macOS has the disable-library-validation entitlement, which allows a local process (with the user's privileges) to obtain unprompted microphone and camera access by loading a crafted library and thereby inheriting Zoom Client's microphone and camera access.

Local information exposure in Zoom Clients