CVE-2019-18800

Current Description

Viber through 11.7.0.5 allows a remote attacker who can capture a victim's internet traffic to steal their Viber account, because not all Viber protocol traffic is encrypted. TCP data packet 9 on port 4244 from the victim's device contains cleartext information such as the device model and OS version, IMSI, and 20 bytes of udid in a binary format, which is located at offset 0x14 of this packet. Then, the attacker installs Viber on his device, initiates the registration process for any phone number, but doesn't enter a pin from SMS. Instead, he closes Viber. Next, the attacker rewrites his udid with the victim's udid, modifying the viber_udid file, which is located in the Viber preferences folder. (The udid is stored in a hexadecimal format.) Finally, the attacker starts Viber again and enters the pin from SMS.

Basic Data

Published	November 06, 2019
Last Modified	November 13, 2019
Assigner	cve@mitre.org
Data Type	CVE
Data Format	MITRE
Data Version	4.0
Problem Type	CWE-20
CVE Data Version	4.0

Base Metric V2

CVSS 2 - Version	2.0
CVSS 2 - Vector String	AV:N/AC:M/Au:N/C:P/I:N/A:N
CVSS 2 - Access Vector	NETWORK
CVSS 2 - Access Complexity	MEDIUM
CVSS 2 - Authentication	NONE
CVSS 2 - Confidentiality Impact	PARTIAL
CVSS 2 - Availability Impact	NONE
CVSS 2 - Base Score	4.3
Severity	MEDIUM
Exploitability Score	8.6
Impact Score	2.9
Obtain All Privilege	false
Obtain User Privilege	false
Obtain Other Privilege	false

Base Metric V3

No data provided.

Configurations

Vulnerable Software List

Vendor	Product	Versions
Rakuten	Viber	*

References