CVE-2024-4040

CrushFTP VFS Sandbox Escape

9.8 CRITICALActively exploited (CISA KEV)Public exploitEPSS 99.5%

Published22 Apr 2024
Added to CISA KEV24 Apr 2024
Remediation due1 May 2024

Description

A server side template injection vulnerability in CrushFTP in all versions before 10.7.1 and 11.1.0 on all platforms allows unauthenticated remote attackers to read files from the filesystem outside of the VFS Sandbox, bypass authentication to gain administrative access, and perform remote code execution on the server.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected products

Crushftp≥ 10.0.0 < 10.7.1 · ≥ 11.0.0 < 11.1.0

Remediation

Fixed in

Crushftp≥ 10.7.1

Patch & vendor advisories

References

https://github.com/airbus-cert/CVE-2024-4040ExploitThird Party Advisory
https://www.bleepingcomputer.com/news/security/crushftp-warns-users-to-patch-exploited-zero-day-immediately/Press/Media CoverageThird Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-4040US Government Resource
https://www.crushftp.com/crush10wiki/Wiki.jsp?page=UpdatePatchVendor Advisory
https://www.crushftp.com/crush11wiki/Wiki.jsp?page=UpdatePatchVendor Advisory
https://www.rapid7.com/blog/post/2024/04/23/etr-unauthenticated-crushftp-zero-day-enables-complete-server-compromise/Third Party Advisory
https://www.reddit.com/r/crowdstrike/comments/1c88788/situational_awareness_20240419_crushftp_virtual/ExploitIssue Tracking
https://www.reddit.com/r/cybersecurity/comments/1c850i2/all_versions_of_crush_ftp_are_vulnerable/Issue TrackingPatch

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2024-4040 being actively exploited?

Yes. CVE-2024-4040 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 24 Apr 2024.

How severe is CVE-2024-4040?

CVE-2024-4040 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 99.5% probability of exploitation.

Which products are affected by CVE-2024-4040?

Affected products include Crushftp.

How do I fix CVE-2024-4040?

Upgrade affected software to a fixed version, for example Crushftp 10.7.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2024-4040 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.