### [CVE-2020-28009](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-28009)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

Exim 4 before 4.94.2 allows Integer Overflow to Buffer Overflow because get_stdinput allows unbounded reads that are accompanied by unbounded increases in a certain size variable. NOTE: exploitation may be impractical because of the execution time needed to overflow (multiple days).

### POC

#### Reference
- https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28009-STDIN.txt
- https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28009-STDIN.txt

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