cve/2020/CVE-2020-12783.md

### [CVE-2020-12783](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12783)
![](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 through 4.93 has an out-of-bounds read in the SPA authenticator that could result in SPA/NTLM authentication bypass in auths/spa.c and auths/auth-spa.c.

### POC

#### Reference
- http://www.openwall.com/lists/oss-security/2021/05/04/7
- http://www.openwall.com/lists/oss-security/2021/05/04/7
- https://bugs.exim.org/show_bug.cgi?id=2571
- https://bugs.exim.org/show_bug.cgi?id=2571

#### Github
- https://github.com/Live-Hack-CVE/CVE-2020-12783