cve/2021/CVE-2021-33393.md

### [CVE-2021-33393](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33393)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brightgreen)

### Description

lfs/backup in IPFire 2.25-core155 does not ensure that /var/ipfire/backup/bin/backup.pl is owned by the root account. It might be owned by an unprivileged account, which could potentially be used to install a Trojan horse backup.pl script that is later executed by root. Similar problems with the ownership/permissions of other files may be present as well.

### POC

#### Reference
- http://packetstormsecurity.com/files/163158/IPFire-2.25-Remote-Code-Execution.html

#### Github
- https://github.com/ARPSyndicate/cvemon
Update Sat May 25 21:48:12 CEST 2024 2024-05-25 21:48:12 +02:00			`### [CVE-2021-33393](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33393)`
			`![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)`
Update CVE list 2025-09-29 21:09 2025-09-29 21:09:30 +02:00			`![](https://img.shields.io/static/v1?label=Version&message=n%2Fa%20&color=brightgreen)`
			`![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brightgreen)`
Update Sat May 25 21:48:12 CEST 2024 2024-05-25 21:48:12 +02:00
			`### Description`

			`lfs/backup in IPFire 2.25-core155 does not ensure that /var/ipfire/backup/bin/backup.pl is owned by the root account. It might be owned by an unprivileged account, which could potentially be used to install a Trojan horse backup.pl script that is later executed by root. Similar problems with the ownership/permissions of other files may be present as well.`

			`### POC`

			`#### Reference`
			`- http://packetstormsecurity.com/files/163158/IPFire-2.25-Remote-Code-Execution.html`

			`#### Github`
			`- https://github.com/ARPSyndicate/cvemon`