cve/2021/CVE-2021-25490.md

### [CVE-2021-25490](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-25490)
![](https://img.shields.io/static/v1?label=Product&message=Samsung%20Mobile%20Devices&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=P(9.0)%2C%20Q(10.0)%2C%20R(11.0)%3C%20SMR%20Oct-2021%20Release%201%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-287%3A%20Improper%20Authentication&color=brighgreen)

### Description

A keyblob downgrade attack in keymaster prior to SMR Oct-2021 Release 1 allows attacker to trigger IV reuse vulnerability with privileged process.

### POC

#### Reference
- https://security.samsungmobile.com/securityUpdate.smsb?year=2021&month=10

#### Github
- https://github.com/shakevsky/keybuster