CVE Vulnerability

CVE-2020-24837

An integer underflow has been found in the latest version of ZCFees. The variables 'currPeriodIdx' and 'lastPeriodExecIdx' are both unsigned integers, and the result of the minus operation may be a negative integer which leads to an underflow. The attackers can modify the current timestamp of the transaction somehow and block the execution of the process function.

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact PARTIAL

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 NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://etherscan.io/address/0x9d79c6e2a0222b9ac7bfabc447209c58fe9e0dcc#code Patch Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:zcfees_project:zcfees:-:*:*:*:*:*:*:*
Information

Published : 2021-02-10 04:15

Updated : 2021-02-17 01:38

NVD link : CVE-2020-24837

Mitre link : CVE-2020-24837

Products Affected
No products.
CWE
CWE-191

Integer Underflow (Wrap or Wraparound)