Deserialization in Progress Ws_ftp_server
CVE-2023-40044
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.
Vulnerability class: Insecure Deserialization
EPSS: 0.901 (99.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Progress Ws_ftp_server
- Progress Software Corporation Ws_ftp Server — versions 8.8.0, 8.7.0
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Known ransomware campaign use: yes.
Public proof-of-concept exploits
References
- security@progress.com (Product, product)
- security@progress.com (vendor-advisory, Vendor Advisory)
- security@progress.com (Third Party Advisory, Press/Media Coverage)
- security@progress.com (Third Party Advisory, Broken Link)
- security@progress.com (Third Party Advisory)
- security@progress.com (Third Party Advisory)
- security@progress.com (Exploit, Third Party Advisory)
- security@progress.com (Exploit, VDB Entry, Third Party Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2023-40044?
- CVE-2023-40044 is a critical-severity vulnerability in Progress Ws_ftp_server, classified under Deserialization of Untrusted Data. CVSS score: 10.0/10. Published 2023-09-27.
- How severe is CVE-2023-40044?
- Critical severity. CVSS v3 base score is 10.0 out of 10.
- Is CVE-2023-40044 known to be exploited?
- Yes. CVE-2023-40044 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-10-05), indicating it is being actively exploited. 14 public proof-of-concept repositories are indexed.