CVE-2019-9502 Broadcom wl driver is vulnerable to heap buffer overflow
A heap buffer overflow in the Broadcom wl WiFi driver allows remote attackers to execute arbitrary code or cause denial of service via crafted packets.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2019-9502?
CVE-2019-9502 is a high-severity memory corruption vulnerability in Synology Router Manager, published on 3 Feb 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
The Broadcom wl WiFi driver is vulnerable to a heap buffer overflow. If the vendor information element data length is larger than 164 bytes, a heap buffer overflow is triggered in wlc_wpa_plumb_gtk. In the worst case scenario, by sending specially-crafted WiFi packets, a remote, unauthenticated attacker may be able to execute arbitrary code on a vulnerable system. More typically, this vulnerability will result in denial-of-service conditions.
Which versions are affected by CVE-2019-9502?
It affects 2 products.
Products include Broadcom Bcm4339 Firmware, Synology Router Manager.
How do I fix CVE-2019-9502?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2019-9502 being exploited?
There is no known exploitation of CVE-2019-9502 in the wild and no public exploit code.
Other vulnerabilities in Synology Router Manager
Sources
Also known as A-130374366, ASB-A-130374366, GHSA-4rfg-8q34-prmp.