CVE-2019-18990 — MEDIUM (5.4)

Vulnerability Description

A partial authentication bypass vulnerability exists on Realtek RTL8812AR 1.21WW, RTL8196D 1.0.0, RTL8192ER 2.10, and RTL8881AN 1.09 devices. The vulnerability allows sending an unencrypted data frame to a WPA2-protected WLAN router where the packet is routed through the network. If successful, a response is sent back as an encrypted frame, which would allow an attacker to discern information or potentially modify data.

CVSS Score

5.4

MEDIUM

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Realtek	Rtl8812Ar Firmware	1.21ww
Realtek	Rtl8812Ar	-
Realtek	Rtl8196D Firmware	1.0.0
Realtek	Rtl8196D	-
Realtek	Rtl8192Er Firmware	2.10
Realtek	Rtl8192Er	-
Realtek	Rtl8881An Firmware	1.09
Realtek	Rtl8881An	-

Related Weaknesses (CWE)

CWE-290

References

https://www.synopsys.com/blogs/software-security/cyrc-advisory-sept2020/Third Party Advisory
https://www.synopsys.com/blogs/software-security/cyrc-advisory-sept2020/Third Party Advisory

FAQ

What is CVE-2019-18990?

CVE-2019-18990 is a vulnerability with a CVSS score of 5.4 (MEDIUM). A partial authentication bypass vulnerability exists on Realtek RTL8812AR 1.21WW, RTL8196D 1.0.0, RTL8192ER 2.10, and RTL8881AN 1.09 devices. The vulnerability allows sending an unencrypted data frame...

How severe is CVE-2019-18990?

CVE-2019-18990 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2019-18990?

Check the references section above for vendor advisories and patch information. Affected products include: Realtek Rtl8812Ar Firmware, Realtek Rtl8812Ar, Realtek Rtl8196D Firmware, Realtek Rtl8196D, Realtek Rtl8192Er Firmware.