CVE-2021-33393

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.

CVSS v3.1

8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0

9.0 HIGHAV:N/AC:L/Au:S/C:C/I:C/A:C

EPSS

58.73% chance of exploitation in the next 30 days, 99th percentile

Published

2021-06-09

Updated

2024-08-03

Proof-of-concept exploits (2)

• http://packetstormsecurity.com/files/163158/IPFire-2.25-Remote-Code-Execution.html
• joaoaugustom/IPFire_2.25_RCE_Authenticated

Metasploit modules (1)

• rapid7/metasploit-framework/blob/master/modules/exploits/linux/http/ipfire_pakfire_exec.rb

ExploitDB entries (1)

• https://www.exploit-db.com/exploits/49869

References

• CVE Record
• NVD entry

Related

• CVE-2017-9757
• CVE-2019-6340
• CVE-2023-26360
• CVE-2023-27350
• CVE-2023-6553
• CVE-2021-33371