CVE Vulnerability

CVE-2018-17877

A lottery smart contract implementation for Greedy 599, an Ethereum gambling game, generates a random value that is predictable via an external contract call. The developer used the extcodesize() function to prevent a malicious contract from being called, but the attacker can bypass it by writing the core code in the constructor of their exploit code. Therefore, it allows attackers to always win and get rewards.

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

Scope

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://github.com/TEAM-C4B/CVE-LIST/tree/master/CVE-2018-17877 Exploit Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:greedy599:greedy_599:-:*:*:*:*:*:*:*
Information

Published : 2018-10-23 09:30

Updated : 2018-12-08 02:15

NVD link : CVE-2018-17877

Mitre link : CVE-2018-17877

Products Affected
No products.
CWE
CWE-338

Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)