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cve[email protected]CVE-2018-14715
HistoryAug 03, 2018 - 6:29 p.m.

CVE-2018-14715

2018-08-0318:29:00
CWE-338
web.nvd.nist.gov
18
cryptogs
ethereum
smart contract
random number
security
vulnerability
nvd
cve-2018-14715

5 Medium

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

7.5 High

CVSS3

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

7.6 High

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

53.8%

The endCoinFlip function and throwSlammer function of the smart contract implementations for Cryptogs, an Ethereum game, generate random numbers with an old block’s hash. Therefore, attackers can predict the random number and always win the game.

Affected configurations

NVD
Node
cryptogscryptogsMatch-
CPENameOperatorVersion
cryptogs:cryptogscryptogseq-

5 Medium

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

7.5 High

CVSS3

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

7.6 High

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

53.8%

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