Overview
Acronis True Image, Cyber Backup, and Cyber Protection all contain privilege escalation vulnerabilities, which can allow an unprivileged Windows user to be able to run arbitrary code with SYSTEM privileges.
Description
CVE-2020-10138
Acronis Cyber Backup 12.5 and Cyber Protect 15 include an OpenSSL component that specifies an OPENSSLDIR variable as a subdirectory within C:jenkins_agent. Acronis Cyber Backup and Cyber Protect contain a privileged service that uses this OpenSSL component. Because unprivileged Windows users can create subdirectories off of the system root, a user can create the appropriate path to a specially-crafted openssl.cnf file to achieve arbitrary code execution with SYSTEM privileges.
CVE-2020-10139
Acronis True Image 2021 includes an OpenSSL component that specifies an OPENSSLDIR variable as a subdirectory within C:jenkins_agent. Acronis True Image contains a privileged service that uses this OpenSSL component. Because unprivileged Windows users can create subdirectories off of the system root, a user can create the appropriate path to a specially-crafted openssl.cnf file to achieve arbitrary code execution with SYSTEM privileges.
CVE-2020-10140
Acronis True Image 2021 fails to properly set ACLs of the C:ProgramDataAcronis directory. Because some privileged processes are executed from the C:ProgramDataAcronis directory, an unprivileged user can achieve arbitrary code execution with SYSTEM privileges by placing a DLL in one of several paths within C:ProgramDataAcronis.
Impact
By placing a specially-crafted openssl.cnf or DLL file in a specific location, an unprivileged user may be able to execute arbitrary code with SYSTEM privileges on a Windows system with the vulnerable Acronis software installed. See DLL Search Order Hijacking for more details.
