Globalvillage Ecosystem Ethereum ERC20 Token approveAndCallcode Smart Contract input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Globalvillage Ecosystem. It has been rated as critical. Impacted is the function approveAndCallcode of the component Ethereum ERC20 Token Handler. The manipulation as part of Smart Contract leads to input validation. This vulnerability is documented as CVE-2018-12702. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Globalvillage Ecosystem (version unknown). It has been rated as critical. This issue affects the function approveAndCallcode of the component Ethereum ERC20 Token Handler. The manipulation as part of a Smart Contract leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The approveAndCallcode function of a smart contract implementation for Globalvillage ecosystem (GVE), an Ethereum ERC20 token, allows attackers to steal assets (e.g., transfer the contract's balances into their account) because the callcode (i.e., _spender.call(_extraData)) is not verified, aka the "evilReflex" issue. NOTE: a PeckShield disclosure states "some researchers have independently discussed the mechanism of such vulnerability."

The bug was discovered 06/23/2018. The weakness was released 06/25/2018 (Website). The advisory is shared at huobiglobal.zendesk.com. The identification of this vulnerability is CVE-2018-12702 since 06/23/2018. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Entry connected to this vulnerability is available at VDB-119862. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

06/23/2018 🔍
06/23/2018 +0 days 🔍
06/25/2018 +1 days 🔍
06/25/2018 +0 days 🔍
06/25/2018 +0 days 🔍
02/21/2020 +606 days 🔍

Sourcesinfo

Advisory: huobiglobal.zendesk.com
Status: Not defined

CVE: CVE-2018-12702 (🔍)
GCVE (CVE): GCVE-0-2018-12702
GCVE (VulDB): GCVE-100-119861
See also: 🔍

Entryinfo

Created: 06/25/2018 21:58
Updated: 02/21/2020 17:09
Changes: 06/25/2018 21:58 (57), 02/21/2020 17:09 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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