CVE-2021-27705 Memory corruption in n/a
Remote attackers can execute arbitrary code on Tenda G1 and G3 routers via a buffer overflow in the QoS rule deletion function.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-27705?
CVE-2021-27705 is a critical memory corruption vulnerability in n/a, published on 14 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Buffer Overflow in Tenda G1 and G3 routers with firmware v15.11.0.17(9502)_CN allows remote attackers to execute arbitrary code via a crafted action/"qosIndex "request. This occurs because the "formQOSRuleDel" function directly passes the parameter "qosIndex" to strcpy without limit.
Weakness: CWE-120
Which versions are affected by CVE-2021-27705?
It affects 2 products.
Products include Tenda G1 Firmware, Tenda G3 Firmware.
How do I fix CVE-2021-27705?
No fix has been published for CVE-2021-27705 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-27705 being exploited?
There is no known exploitation of CVE-2021-27705 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-ffgg-83p3-wqxr.