cve/2018/CVE-2018-20452.md

### [CVE-2018-20452](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20452)
![](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 read_MSAT_body function in ole.c in libxls 1.4.0 has an invalid free that allows attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a crafted file, because of inconsistent memory management (new versus free) in ole2_read_header in ole.c.

### POC

#### Reference
- https://github.com/evanmiller/libxls/issues/35
- https://github.com/evanmiller/libxls/issues/35

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