Heap-based buffer overflow in R7000 - CVE-2021-31802
Published: April 28, 2021 / Updated: July 29, 2021
Vulnerability identifier: #VU52708
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-31802
CWE-ID: CWE-122
Exploitation vector: Adjecent network
Exploit availability:
Public exploit is 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 backup.cgi file upload. A remote attacker on the local network can pass specially crafted data to the application, trigger 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
R7000
How to mitigate CVE-2021-31802
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.