CVE-2021-20852 Command injection in ELECOM LAN routers
A network-adjacent administrator can execute arbitrary OS commands on ELECOM LAN routers due to a buffer overflow vulnerability.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-20852?
CVE-2021-20852 is a medium-severity command injection vulnerability in ELECOM LAN routers, published on 1 Dec 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Buffer overflow vulnerability in ELECOM LAN routers (WRH-733GBK firmware v1.02.9 and prior and WRH-733GWH firmware v1.02.9 and prior) allows a network-adjacent attacker with an administrator privilege to execute an arbitrary OS command via unspecified vectors.
Weakness: CWE-120
Which versions are affected by CVE-2021-20852?
It affects 2 products.
Products include Elecom Wrh-733gbk Firmware, Elecom Wrh-733gwh Firmware.
How do I fix CVE-2021-20852?
No fix has been published for CVE-2021-20852 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2021-20852 being exploited?
There is no known exploitation of CVE-2021-20852 in the wild and no public exploit code.
Other vulnerabilities in ELECOM LAN routers
Sources
Also known as GHSA-6pq5-g5mf-96hw.