### [CVE-2010-4021](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-4021)
![](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

The Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.7 does not properly restrict the use of TGT credentials for armoring TGS requests, which might allow remote authenticated users to impersonate a client by rewriting an inner request, aka a "KrbFastReq forgery issue."

### POC

#### Reference
- http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2010-007.txt

#### Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/blamhang/nopc