SB2021060501 - Remote code execution when parsing WPA2 key in Realtek WiFi chipsets

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Stack-based buffer overflow (CVE-ID: CVE-2020-27301)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when parsing WPA2 key. A remote attacker with knowledge of network PSK can send specially crafted packets to devices connected to the WiFi network, trigger stack-based buffer overflow and execute arbitrary code on WiFi client devices.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

2) Stack-based buffer overflow (CVE-ID: CVE-2020-27302)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when parsing WPA2 key. A remote attacker with knowledge of network PSK can send specially crafted packets to devices connected to the WiFi network, trigger stack-based buffer overflow and execute arbitrary code on WiFi client devices.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Remediation

Install update from vendor's website.

References

• https://www.vdoo.com/blog/realtek-wifi-vulnerabilities-zero-day