Out-of-bounds read in VMware Horizon Client and VMware Workstation - CVE-2021-21989
Published: May 24, 2021 / Updated: May 26, 2021
Vulnerability identifier: #VU53433
CSH Severity: Low
CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-21989
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in the Cortado ThinPrint component within the TTC parser. A remote attacker can trigger an out-of-bounds read error with a specially crafted font file and read contents of memory on the system.
Affected software
VMware Horizon Client
VMware Workstation
VMware Workstation
How to mitigate CVE-2021-21989
Install updates from vendor's website.
VMware Horizon Client - update to 5.5.2
VMware Workstation - update to 16.1.2
VMware Workstation - update to 16.1.2