WS_FTP Server Ad Hoc Transfer Module .NET Deserialization Vulnerability
CVE-2023-40044

8.8HIGH

Key Information:

Vendor
CVE Published:
27 September 2023

Badges

💰 Ransomware👾 Exploit Exists🟡 Public PoC🟣 EPSS 86%🦅 CISA Reported📰 News Worthy

Summary

A significant security vulnerability exists in the WS_FTP Server Ad Hoc Transfer module, affecting versions prior to 8.7.4 and 8.8.2. This vulnerability stems from improper .NET deserialization, allowing pre-authenticated attackers to execute arbitrary commands on the WS_FTP Server's operating system, potentially leading to unauthorized access and control over affected systems. Immediate action is recommended to mitigate risks associated with this severe flaw.

CISA Reported

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed as being exploited and is known by the CISA as enabling ransomware campaigns.

The CISA's recommendation is: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Affected Version(s)

WS_FTP Server 8.8.0

WS_FTP Server 8.8.0 < 8.8.2

WS_FTP Server 8.7.0 < 8.7.4

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

News Articles

WS_FTP flaw CVE-2023-40044 actively exploited in the wild

Experts warn of threat actors actively exploiting CVE-2023-40044 flaw in recently disclosed flaw in Progress Software’s WS_FTP products.

1 year ago

References

EPSS Score

86% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • 💰

    Used in Ransomware

  • 🦅

    CISA Reported

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • 📰

    First article discovered by Security Affairs

  • Vulnerability published

  • Vulnerability Reserved

Collectors

NVD DatabaseMitre DatabaseCISA Database1 Proof of Concept(s)1 News Article(s)

Credit

Shubham Shah - Assetnote
Sean Yeoh - Assetnote
.