CVE-2019-9500: Broadcom brcmfmac driver is vulnerable to a heap buffer overflow

Vulnerability summary

CVE-2019-9500 is a high (CVSS 8.3) Heap-based Buffer Overflow vulnerability in broadcom brcmfmac_driver. EPSS estimates a 3.85% chance of exploitation in the next 30 days, higher than 90.1% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 16-01-2020
   PublishedVulnerability first disclosed.
2. 04-08-2024
   Last modifiedVulnerability information updated.

Description

The Broadcom brcmfmac WiFi driver prior to commit 1b5e2423164b3670e8bc9174e4762d297990deff is vulnerable to a heap buffer overflow. If the Wake-up on Wireless LAN functionality is configured, a malicious event frame can be constructed to trigger an heap buffer overflow in the brcmf_wowl_nd_results function. This vulnerability can be exploited with compromised chipsets to compromise the host, or when used in combination with CVE-2019-9503, can be used remotely. 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.

• CWE-122Heap-based Buffer OverflowThe product writes past the end of a buffer that was allocated on the heap.
• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.