Which products and versions are affected by CVE-2021-33393?

Affected: Ipfire versions 2.25-core_update141, 2.25-core_update142, 2.25-core_update143, 2.25-core_update144, 2.25-core_update145, 2.25-core_update146, 2.25-core_update147, 2.25-core_update148. The full list is in the CVE brief.

Is CVE-2021-33393 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2021-33393 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2021-33393?

Public exploit code is available.

Is there a fix for CVE-2021-33393?

Fixed versions are available, including Ipfire 2.25.

How urgently should CVE-2021-33393 be patched?

Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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Vulnerability Intelligence

CVE-2021-33393

HighPublic exploit

lfs/backup in IPFire 2.25-core155 does not ensure that /var/ipfire/backup/bin/backup.pl is owned by the root account.

Published Jun 9, 2021 · Updated Nov 21, 2024

Key Facts

Patch immediately

CVE-2021-33393 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting Ipfire.
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 59% probability of exploitation in the next 30 days.
Fixed versions are available, including Ipfire 2.25.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

CVSS v3.1

8.8

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

EPSS (30-day exploit likelihood)

59%

Higher than 99.1% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2021-33393 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

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.

Affected Products

15 affected entries in total

Product	Affected versions	Fixed in
IpfireIpfire	2.25-core_update141, 2.25-core_update142, 2.25-core_update143, 2.25-core_update144, 2.25-core_update145, 2.25-core_update146, 2.25-core_update147, 2.25-core_update148	2.25

Patched Releases

Ipfire

2.25

Timeline

Publicly disclosed
Jun 9, 2021
Last updated
Nov 21, 2024

References

1 more references in the full CVE brief

FAQ

Common Questions.

lfs/backup in IPFire 2.25-core155 does not ensure that /var/ipfire/backup/bin/backup.pl is owned by the root account.
Affected: Ipfire versions 2.25-core_update141, 2.25-core_update142, 2.25-core_update143, 2.25-core_update144, 2.25-core_update145, 2.25-core_update146, 2.25-core_update147, 2.25-core_update148. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Ipfire 2.25.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

Is CVE-2021-33393 Running On Your Attack Surface?

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