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MitreCVE-2018-17877

HistoryOct 23, 2018 - 9:30 p.m.

CVE-2018-17877

2018-10-2321:30:53

CWE-338

mitre

web.nvd.nist.gov

ethereum

gambling

smart contract

vulnerability

external contract call

security

nvd

cve-2018-17877

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

AI Score

7.5

Confidence

High

EPSS

0.006

Percentile

78.3%

JSON

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.

Affected configurations

Nvd

Node

greedy599greedy_599Match-

VendorProductVersionCPE
greedy599greedy_599-cpe:2.3:a:greedy599:greedy_599:-:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
greedy599	greedy_599	-	cpe:2.3:a:greedy599:greedy_599:-:::::::*

References

github.com/TEAM-C4B/CVE-LIST/tree/master/CVE-2018-17877

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

AI Score

7.5

Confidence

High

EPSS

0.006

Percentile

78.3%

JSON

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