cve/2019/CVE-2019-19923.md

### [CVE-2019-19923](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19923)
![](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

flattenSubquery in select.c in SQLite 3.30.1 mishandles certain uses of SELECT DISTINCT involving a LEFT JOIN in which the right-hand side is a view. This can cause a NULL pointer dereference (or incorrect results).

### POC

#### Reference
- https://github.com/sqlite/sqlite/commit/396afe6f6aa90a31303c183e11b2b2d4b7956b35
- https://github.com/sqlite/sqlite/commit/396afe6f6aa90a31303c183e11b2b2d4b7956b35
- https://www.oracle.com/security-alerts/cpuapr2020.html
- https://www.oracle.com/security-alerts/cpuapr2020.html

#### Github
- https://github.com/garethr/snykout