CVE-2023-40044: WS_FTP Server Ad Hoc Transfer Module .NET Deserialization Vulnerability
Critical · CVSS 10.0 (CVSS 3.1)KEV known exploitedEPSS 90.4%, 100th percentilePublished Updated Assigner: ProgressSoftware
In CISA’s Known Exploited Vulnerabilities catalog: Progress WS_FTP Server Deserialization of Untrusted Data Vulnerability.
Added , federal remediation due . Known ransomware use: Known.
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Description
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.
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H · CWE-502
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
Progress Software Corporation: WS_FTP Server
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- packetstormsecurity.com/files/174917/Progress-Software-WS_FTP-Unauthenticated-Remote-Code-Exe… (opens in new tab)
- attackerkb.com/topics/bn32f9sNax/cve-2023-40044 (opens in new tab)
- censys.com/cve-2023-40044/ (opens in new tab)
- community.progress.com/s/article/WS-FTP-Server-Critical-Vulnerability-September-2023 (opens in new tab)
- www.assetnote.io/resources/research/rce-in-progress-ws-ftp-ad-hoc-via-iis-http-modules… (opens in new tab)
- www.progress.com/ws_ftp (opens in new tab)
- www.rapid7.com/blog/post/2023/09/29/etr-critical-vulnerabilities-in-ws_ftp-server/ (opens in new tab)
- www.theregister.com/2023/10/02/ws_ftp_update/ (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)