CVE-2021-20091 Command injection in Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3
An authenticated attacker can inject commands via the web interface to alter configuration and execute arbitrary code on Buffalo routers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-20091?
CVE-2021-20091 is a high-severity command injection vulnerability in Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3, published on 29 Apr 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The web interfaces of Buffalo WSR-2533DHPL2 firmware version <= 1.02 and WSR-2533DHP3 firmware version <= 1.24 do not properly sanitize user input. An authenticated remote attacker could leverage this vulnerability to alter device configuration, potentially gaining remote code execution.
Which versions are affected by CVE-2021-20091?
It affects 2 products.
Products include Buffalo Wsr-2533dhp3-Bk Firmware, Buffalo Wsr-2533dhpl2-Bk Firmware.
How do I fix CVE-2021-20091?
No fix has been published for CVE-2021-20091 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-2021-20091 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-20091 exists.
Public exploit code: 1 Nuclei template.
Other vulnerabilities in Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3
Sources
Also known as GHSA-6rqh-8mhj-w4pr.