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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5 High
AI Score
Confidence
High
0.005 Low
EPSS
Percentile
77.2%
The Bitcoin Proof-of-Work algorithm does not consider a certain attack methodology related to 80-byte block headers with a variety of initial 64-byte chunks followed by the same 16-byte chunk, multiple candidate root values ending with the same 4 bytes, and calculations involving sqrt numbers. This violates the security assumptions of (1) the choice of input, outside of the dedicated nonce area, fed into the Proof-of-Work function should not change its difficulty to evaluate and (2) every Proof-of-Work function execution should be independent. NOTE: a number of persons feel that this methodology is a benign mining optimization, not a vulnerability
CPE | Name | Operator | Version |
---|---|---|---|
bitcoin:bitcoin | bitcoin | eq | - |
www.mit.edu/~jlrubin//public/pdfs/Asicboost.pdf
www.securityfocus.com/bid/98657
arxiv.org/ftp/arxiv/papers/1604/1604.00575.pdf
lists.linuxfoundation.org/pipermail/bitcoin-dev/2017-April/013996.html
lists.linuxfoundation.org/pipermail/bitcoin-dev/2017-May/014349.html
lists.linuxfoundation.org/pipermail/bitcoin-dev/2017-May/014351.html
lists.linuxfoundation.org/pipermail/bitcoin-dev/2017-May/014352.html
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5 High
AI Score
Confidence
High
0.005 Low
EPSS
Percentile
77.2%