CVE-2021-33393

Public Exploit

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.

8.8

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 72.57% Top 5%

Third-Party Advisory packetstormsecurity.com Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com

Affected: n/a n/a

References

Link	Tags
https://github.com/MucahitSaratar/ipfire-2-25-auth-rce	third party advisory exploit
https://github.com/ipfire/ipfire-2.x/commit/6769d909306d7bdc43d64598872126fcf1b217f6	third party advisory patch
https://github.com/ipfire/ipfire-2.x/commits/master?since=2021-05-17&until=2021-05-17	third party advisory
http://packetstormsecurity.com/files/163158/IPFire-2.25-Remote-Code-Execution.html	exploit vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-33393?: CVE-2021-33393 has been scored as a high severity vulnerability.
How to fix CVE-2021-33393?: To fix CVE-2021-33393, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-33393 being actively exploited in the wild?: It is possible that CVE-2021-33393 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~73% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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