CVE Vulnerability

CVE-2018-18920

Py-EVM v0.2.0-alpha.33 allows attackers to make a vm.execute_bytecode call that triggers computation._stack.values with '"stack": [100, 100, 0]' where b'x' was expected, resulting in an execution failure because of an invalid opcode. This is reportedly related to "smart contracts can be executed indefinitely without gas being paid."

6.8 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8.6 / Impact : 6.4

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

Scope

8.8 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://www.reddit.com/r/ethereum/comments/9vkk2g/netta_labs_claim_to_have_found_a_vulnerability_in/e9d3wyx/ Third Party Advisory
https://twitter.com/NettaLab/status/1060889400102383617 Third Party Advisory
https://twitter.com/AlexanderFisher/status/1060923428641878019 Third Party Advisory
https://github.com/ethereum/py-evm/issues/1448 Exploit Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:ethereum:py-evm:0.2.0:alpha.33:*:*:*:*:*:*
Information

Published : 2018-11-12 02:29

Updated : 2019-02-04 01:31

NVD link : CVE-2018-18920

Mitre link : CVE-2018-18920

Products Affected
No products.
CWE
CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer