CVE-2018-19983 Information

Description

An issue was discovered on Sigma Design Z-Wave S0 through S2 devices. An attacker first prepares a Z-Wave frame-transmission program (e.g. Z-Wave PC Controller OpenZWave CC1110 etc.). Next the attacker conducts a DoS attack against the Z-Wave S0 Security version product by continuously sending divided \Nonce Get (0x98 0x81)\ frames. The reason for dividing the \Nonce Get\ frame is that in security version S0 when a node receives a \Nonce Get\ frame the node produces a random new nonce and sends it to the Src node of the received \Nonce Get\ frame. After the nonce value is generated and transmitted the node transitions to wait mode. At this time when \Nonce Get\ is received again the node discards the previous nonce value and generates a random nonce again. Therefore because the frame is encrypted with previous nonce value the received normal frame cannot be decrypted.

CVSS Vector

CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

https://github.com/min1233/CVE/blob/master/2

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

6.5