CVE-2021-33393
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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 59.3%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 59.35% probability · 99th percentile
- Public exploits
- 1 in Exploit-DB · first 17 May 2021
- CISA KEV
- Not listed
- Affected
- ipfire/ipfire
- Source
- cve@mitre.org
EPSS 59.3% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://packetstormsecurity.com/files/163158/IPFire-2.25-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- https://github.com/MucahitSaratar/ipfire-2-25-auth-rceExploit, Third Party Advisory
- https://github.com/ipfire/ipfire-2.x/commit/6769d909306d7bdc43d64598872126fcf1b217f6Patch, Third Party Advisory
- https://github.com/ipfire/ipfire-2.x/commits/master?since=2021-05-17&until=2021-05-17Third Party Advisory
- http://packetstormsecurity.com/files/163158/IPFire-2.25-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
- https://github.com/MucahitSaratar/ipfire-2-25-auth-rceExploit, Third Party Advisory
- https://github.com/ipfire/ipfire-2.x/commit/6769d909306d7bdc43d64598872126fcf1b217f6Patch, Third Party Advisory
- https://github.com/ipfire/ipfire-2.x/commits/master?since=2021-05-17&until=2021-05-17Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.