simplelottery PayWinner maxTickets weak prng

CVSS Meta Temp Score
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CTI Interest Score
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7.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in simplelottery. Impacted is the function PayWinner. This manipulation of the argument maxTickets as part of Smart Contract causes weak prng. This vulnerability appears as CVE-2018-15552. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability classified as critical was found in simplelottery (affected version unknown). Affected by this vulnerability is the function PayWinner. The manipulation of the argument maxTickets as part of a Smart Contract leads to a weak prng vulnerability. The CWE definition for the vulnerability is CWE-338. The product uses a Pseudo-Random Number Generator (PRNG) in a security context, but the PRNG's algorithm is not cryptographically strong. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

The "PayWinner" function of a simplelottery smart contract implementation for The Ethereum Lottery, an Ethereum gambling game, generates a random value with publicly readable variable "maxTickets" (which is private, yet predictable and readable by the eth.getStorageAt function). Therefore, it allows attackers to always win and get rewards.

The bug was discovered 09/10/2018. The weakness was presented 09/07/2018 (Website). The advisory is shared at github.com. This vulnerability is known as CVE-2018-15552 since 08/19/2018. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1600.001 for this issue.

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

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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: Weak prng
CWE: CWE-338 / CWE-331 / CWE-330
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

08/19/2018 🔍
09/07/2018 +19 days 🔍
09/07/2018 +0 days 🔍
09/08/2018 +1 days 🔍
09/10/2018 +2 days 🔍
03/21/2020 +558 days 🔍

Sourcesinfo

Advisory: github.com
Status: Not defined

CVE: CVE-2018-15552 (🔍)
GCVE (CVE): GCVE-0-2018-15552
GCVE (VulDB): GCVE-100-123733

Entryinfo

Created: 09/08/2018 09:00
Updated: 03/21/2020 15:47
Changes: 09/08/2018 09:00 (55), 03/21/2020 15:47 (1)
Complete: 🔍
Cache ID: 216::103

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