CVE-2021-28139 Memory corruption in n/a

High 8.8 Published 7 Sep 2021 Updated 3 Aug 2024

Attackers in radio range can trigger arbitrary code execution on ESP32 devices via a crafted Bluetooth LMP packet due to improper feature page restriction.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-28139?

CVE-2021-28139 is a high-severity memory corruption vulnerability in n/a, published on 7 Sep 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The Bluetooth Classic implementation in Espressif ESP-IDF 4.4 and earlier does not properly restrict the Feature Page upon reception of an LMP Feature Response Extended packet, allowing attackers in radio range to trigger arbitrary code execution in ESP32 via a crafted Extended Features bitfield payload.

Which versions are affected by CVE-2021-28139?

It affects 1 product.

Products include Espressif Esp-Idf.

How do I fix CVE-2021-28139?

No fix has been published for CVE-2021-28139 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-2021-28139 being exploited?

There is no known exploitation of CVE-2021-28139 in the wild and no public exploit code.

Sources

Also known as GHSA-jr8m-qx83-r6p3.