CVE-2021-48019
MEDIUM
6,3
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Confidentiality: N/A
Integrity: N/A
Availability: N/A
MEDIUM
4,8
Source: [email protected]
Attack Vector: network
Attack Complexity: high
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: none
Integrity: low
Availability: low
Description
AI Translation Available
Vyper before 0.2.9 deploys forwarder proxies through the built-in create_forwarder_to function that report a fixed 4096-byte RETURNDATASIZE rather than the actual return data size. Calls through these proxies can yield corrupted data when a function returns more than 4096 bytes without return data sanitation, and fail strict return-size checks such as SafeERC20.safeTransfer.
805
Buffer Access with Incorrect Length Value
IncompleteCommon Consequences
Security Scopes Affected:
Integrity
Confidentiality
Availability
Potential Impacts:
Read Memory
Modify Memory
Execute Unauthorized Code Or Commands
Dos: Crash, Exit, Or Restart
Dos: Resource Consumption (Cpu)
Applicable Platforms
Languages:
Memory-Unsafe, C, C++, Assembly
https://github.com/vyperlang/vyper/security/advisories/GHSA-375m-5fvv-xq23
https://www.vulncheck.com/advisories/vyper-before-0.2.9-incorrect-returndatasiz…