CVE-2021-21987: VMware Workstation ThinPrint TTCHeader Out-Of-Bounds Read Information Disclosure Vulnerability
This vulnerability allows local attackers to disclose sensitive information on affected installations of VMware Workstation. An attacker must first obtain the ability to execute low-privileged code on the target guest system in order to exploit this vulnerability. The specific flaw exists within the ThinPrint component. Crafted data in a font file can trigger a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to escalate privileges and execute arbitrary code in the context of the hypervisor.
Other sources
VMware Workstation (16.x prior to 16.1.2) and Horizon Client for Windows (5.x prior to 5.5.2) contain out-of-bounds read vulnerability in the Cortado ThinPrint component (TTC Parser). A malicious actor with access to a virtual machine or remote desktop may be able to exploit these issues leading to information disclosure from the TPView process running on the system where Workstation or Horizon Client for Windows is installed.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is CVE-2021-21987?
CVE-2021-21987 is a vulnerability in VMware Workstation that allows local attackers to disclose sensitive information.
How does CVE-2021-21987 impact VMware Workstation?
CVE-2021-21987 allows local attackers to disclose sensitive information on affected installations of VMware Workstation.
What is the severity of CVE-2021-21987?
The severity of CVE-2021-21987 is medium with a CVSS score of 6.5.
How can CVE-2021-21987 be exploited?
Attackers must first obtain the ability to execute low-privileged code on the target guest system in order to exploit CVE-2021-21987.
Are there any patches or fixes available for CVE-2021-21987?
Yes, VMware has released security advisories and patches to address CVE-2021-21987. Please refer to the official VMware security advisory for more information.