CVEs-PoC/2021/CVE-2021-46102.md

### [CVE-2021-46102](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-46102)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brightgreen)

### Description

From version 0.2.14 to 0.2.16 for Solana rBPF, function "relocate" in the file src/elf.rs has an integer overflow bug because the sym.st_value is read directly from ELF file without checking. If the sym.st_value is rather large, an integer overflow is triggered while calculating the variable "addr" via "addr = (sym.st_value + refd_pa) as u64";

### POC

#### Reference
- https://blocksecteam.medium.com/new-integer-overflow-bug-discovered-in-solana-rbpf-7729717159ee
- https://github.com/solana-labs/rbpf/blob/c14764850f0b83b58aa013248eaf6d65836c1218/src/elf.rs#L609-L630

#### Github
No PoCs found on GitHub currently.