Heap-based buffer overflow in SMA 100 - CVE-2021-20045
Published: December 7, 2021
Vulnerability identifier: #VU58626
CSH Severity: Critical
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-20045
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in the RAC_COPY_TO (RacNumber 36) method which allows users to upload files to an SMB share and can be called without any authentication. A remote attacker can pass specially crafted data to the application, trigger a heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
SMA 100
How to mitigate CVE-2021-20045
Install updates from vendor's website.
SMA 100 - addressed in versions 10.2.0.9-41sv, 10.2.1.3-27sv