CVE-2021-35003 Memory corruption in Archer C90
Remote attackers can execute arbitrary code as root on TP-Link Archer C90 routers via a stack-based buffer overflow in DNS response handling.
- 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-2021-35003?
CVE-2021-35003 is a critical memory corruption vulnerability in TP-Link Archer C90, published on 21 Jan 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
This vulnerability allows remote attackers to execute arbitrary code on affected installations of TP-Link Archer C90 1.0.6 Build 20200114 rel.73164(5553) routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of DNS responses. A crafted DNS message can trigger an overflow of a fixed-length, stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-14655.
Weakness: CWE-121
Which versions are affected by CVE-2021-35003?
It affects 1 product.
Products include Tp-Link Archer C90 Firmware.
How do I fix CVE-2021-35003?
No fix has been published for CVE-2021-35003 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-2021-35003 being exploited?
There is no known exploitation of CVE-2021-35003 in the wild and no public exploit code.
Sources
Also known as GHSA-rhx8-wcjx-qf76.