CVE-2018-12703 Business logic in n/a
Attackers can steal assets from the Block 18 token contract by exploiting unverified callcode execution in the approveAndCallcode function.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2018-12703?
CVE-2018-12703 is a high-severity vulnerability in n/a, published on 25 Jun 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The approveAndCallcode function of a smart contract implementation for Block 18 (18T), an tradable Ethereum ERC20 token, allows attackers to steal assets (e.g., transfer the contract's balances into their account) because the callcode (i.e., _spender.call(_extraData)) is not verified, aka the "evilReflex" issue. NOTE: a PeckShield disclosure states "some researchers have independently discussed the mechanism of such vulnerability."
Weakness: CWE-20
Which versions are affected by CVE-2018-12703?
It affects 1 product.
Products include Block18 Block18.
How do I fix CVE-2018-12703?
No fix has been published for CVE-2018-12703 yet. Limit exposure of the affected software until one is available.
Is CVE-2018-12703 being exploited?
There is no known exploitation of CVE-2018-12703 in the wild and no public exploit code.
Sources
Also known as GHSA-cq3j-7hw5-fcwp.