All For One maxRandom _seed weak prng

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability was found in All For One. It has been classified as problematic. The affected element is the function maxRandom. This manipulation of the argument _seed as part of Smart Contract causes weak prng. This vulnerability appears as CVE-2018-12056. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability has been found in All For One (unknown version) and classified as problematic. Affected by this vulnerability is the function maxRandom. The manipulation of the argument _seed 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. The summary by CVE is:

The maxRandom function of a smart contract implementation for All For One, an Ethereum gambling game, generates a random value with publicly readable variables because the _seed value can be retrieved with a getStorageAt call. Therefore, it allows attackers to always win and get rewards.

The bug was discovered 08/09/2018. The weakness was presented 08/15/2018 (Website). The advisory is shared at medium.com. This vulnerability is known as CVE-2018-12056 since 06/08/2018. 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.

The vulnerability was handled as a non-public zero-day exploit for at least 6 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.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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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

06/08/2018 🔍
08/09/2018 +62 days 🔍
08/15/2018 +5 days 🔍
08/15/2018 +0 days 🔍
08/16/2018 +1 days 🔍
03/16/2020 +578 days 🔍

Sourcesinfo

Advisory: medium.com
Status: Not defined

CVE: CVE-2018-12056 (🔍)
GCVE (CVE): GCVE-0-2018-12056
GCVE (VulDB): GCVE-100-122953

Entryinfo

Created: 08/16/2018 06:33
Updated: 03/16/2020 08:29
Changes: 08/16/2018 06:33 (56), 03/16/2020 08:29 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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