CVE-2018-8879 Memory corruption in n/a

Critical 9.8 Published 21 Nov 2019 Updated 5 Aug 2024

Remote attackers can execute arbitrary code on ASUS routers via a stack-based buffer overflow in the blocking.asp page.

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-2018-8879?

CVE-2018-8879 is a critical memory corruption vulnerability in n/a, published on 21 Nov 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Stack-based buffer overflow in Asuswrt-Merlin firmware for ASUS devices older than 384.4 and ASUS firmware before 3.0.0.4.382.50470 for devices allows remote attackers to execute arbitrary code by providing a long string to the blocking.asp page via a GET or POST request. Vulnerable parameters are flag, mac, and cat_id.

Weakness: CWE-787

Which versions are affected by CVE-2018-8879?

It affects 1 product.

Products include Asus Rt-Ac66u Firmware.

How do I fix CVE-2018-8879?

No fix has been published for CVE-2018-8879 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-2018-8879 being exploited?

There is no known exploitation of CVE-2018-8879 in the wild and no public exploit code.

Sources

Also known as GHSA-8c78-mq7w-pq49.