Integer overflow in Blocklancertoken Project
CVE-2021-33403
An integer overflow in the transfer function of a smart contract implementation for Lancer Token, an Ethereum ERC20 token, allows the owner to cause unexpected financial losses between two large accounts during a transaction.
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.012 (66.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 66.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cn.etherscan.com/address/0x63e634330a20150dbb61b15648bc73855d6ccf07 (Exploit, Third Party Advisory)
- github.com/MRdoulestar/SC-RCVD/blob/main/Vulnerabilities/LNCToken.md (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-33403?
- CVE-2021-33403 is a high-severity vulnerability in Blocklancertoken Project, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2021-08-03.
- How severe is CVE-2021-33403?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-33403 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.