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.

CVSS v3.0 8.8 HIGH
CVSS v2.0 4.3 MEDIUM

8.8^/10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

4.3^/10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:N/AC:M/Au:N/C:P/I:N/A:N

Exploitability : 8.6 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
https://thesamarkand.tumblr.com/post/188785277609/viber-messenger-remote-account-reset-0day	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

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

Information

Published : 2019-11-06 08:15

Updated : 2020-08-24 10:37

NVD link : CVE-2019-18800

Mitre link : CVE-2019-18800

JSON object : View

CWE

CWE-311

Missing Encryption of Sensitive Data

CWE-319

Cleartext Transmission of Sensitive Information

Products Affected

rakuten

viber

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8.8 /10