CVE-2019-18800

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.
Configurations

Configuration 1

cpe:2.3:a:rakuten:viber:*:*:*:*:*:android:*:*

Information

Published : 2019-11-06 04:15

Updated : 2020-08-24 05:37


NVD link : CVE-2019-18800

Mitre link : CVE-2019-18800

Products Affected
No products.
CWE
CWE-311

Missing Encryption of Sensitive Data

CWE-319

Cleartext Transmission of Sensitive Information