CVE Vulnerability

CVE-2018-20421

Go Ethereum (aka geth) 1.8.19 allows attackers to cause a denial of service (memory consumption) by rewriting the length of a dynamic array in memory, and then writing data to a single memory location with a large index number, as demonstrated by use of "assembly { mstore }" followed by a "c[0xC800000] = 0xFF" assignment.

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://github.com/ethereum/go-ethereum/issues/18289 Exploit Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:ethereum:go_ethereum:1.8.19:*:*:*:*:*:*:*
Information

Published : 2018-12-24 03:29

Updated : 2019-10-03 12:03

NVD link : CVE-2018-20421

Mitre link : CVE-2018-20421

Products Affected
No products.
CWE
CWE-770