mppx is a TypeScript interface for machine payments protocol. Prior to version 0.4.11, the tempo/session cooperative close handler validated the close voucher amount using "<" instead of "<=" against the on-chain settled amount. An attacker could submit a close voucher exactly equal to the settled amount, which would be accepted without committing any new funds, effectively closing or griefing the channel for free.
This issue has been patched in version 0.4.11.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products 1
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Wevm Mppx
cpe:2.3:a:wevm:mppx:*:*:*:*:*:node.js:*:*
|
— |
0.4.11
|
References 3
https://github.com/wevm/mppx/security/advisories/GHSA-mv9j-8jvg-j8mr
https://github.com/wevm/mppx/security/advisories/GHSA-mv9j-8jvg-j8mr
https://github.com/wevm/mppx/commit/94088246ee18f21b5d6be40d9e7a464f5a280bfb
https://github.com/wevm/mppx/commit/94088246ee18f21b5d6be40d9e7a464f5a280bfb
https://github.com/wevm/mppx/releases/tag/mppx@0.4.11
https://github.com/wevm/mppx/releases/tag/mppx@0.4.11