In WS_FTP Server versions prior to 8.7.4 and 8.8.2, a pre-authenticated attacker could leverage a .NET deserialization vulnerability in the Ad Hoc Transfer module to execute remote commands on the underlying WS_FTP Server operating system.  
Published 2023-09-27 15:18:57
Updated 2023-10-04 17:15:10
View at NVD,   CVE.org

Products affected by CVE-2023-40044

CVE-2023-40044 is in the CISA Known Exploited Vulnerabilities Catalog

This issue is known to have been leveraged as part of a ransomware campaign.
CISA vulnerability name:
Progress WS_FTP Server Deserialization of Untrusted Data Vulnerability
CISA required action:
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
CISA description:
Progress WS_FTP Server contains a deserialization of untrusted data vulnerability in the Ad Hoc Transfer module that allows an authenticated attacker to execute remote commands on the underlying operating system.
Notes:
https://community.progress.com/s/article/WS-FTP-Server-Critical-Vulnerability-September-2023; https://nvd.nist.gov/vuln/detail/CVE-2023-40044
Added on 2023-10-05 Action due date 2023-10-26

Exploit prediction scoring system (EPSS) score for CVE-2023-40044

86.62%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 99 %
Percentile, the proportion of vulnerabilities that are scored at or less

Metasploit modules for CVE-2023-40044

  • Progress Software WS_FTP Unauthenticated Remote Code Execution
    Disclosure Date: 2023-09-27
    First seen: 2023-10-08
    exploit/windows/http/ws_ftp_rce_cve_2023_40044
    This module exploits an unsafe .NET deserialization vulnerability to achieve unauthenticated remote code execution against a vulnerable WS_FTP server running the Ad Hoc Transfer module. All versions of WS_FTP Server prior to 2020.0.4 (version 8.7.4) and 2022.0.2 (versi

CVSS scores for CVE-2023-40044

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
8.8
HIGH CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
2.8
5.9
NIST
10.0
CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
3.9
6.0
Progress Software Corporation

CWE ids for CVE-2023-40044

  • The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid.
    Assigned by:
    • nvd@nist.gov (Primary)
    • security@progress.com (Secondary)

References for CVE-2023-40044

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