Git-Mirrors/blockchains-security-toolkit
1
0
Fork 0
mirror of https://github.com/autistic-symposium/blockchains-security-toolkit.git synced 2025-06-24 22:50:41 -04:00
Code Issues Projects Releases Packages Wiki Activity

Update README.md

Browse source
This commit is contained in:
steinkirch.eth, phd 2023-06-19 09:10:17 -07:00 • committed by GitHub
parent 4a224313e3
commit b208ff451a
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
1 changed files with 3 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

4
advanced_expert/vulnerabilities/reentrancy_attacks/README.md
View file

@ -4,7 +4,9 @@
### tl; dr
* when a contract calls an external function, that external function may itself call the calling function.
* a reentrancy attack may occur when a function makes an external call to another untrusted contract. Then, the unstrusted contract makes a recursive callback to the vulnerable contract function to steal funds.
* a reentrancy attack may occur when:
* a function makes an external call to a untrusted contract
* the unstrusted contract makes a recursive callback to a vulnerable contract function to steal funds
* to prevent this attack, a contract can implement a lock in storage that prevents re-entrant calls.