High severity · published Sep 27, 2023
CVE-2023-40044
WS_FTP Server Ad Hoc Transfer Module .NET Deserialization Vulnerability
RansomwareIn wildKEV
8.8
CVSS
90.4%
EPSS
Yes
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)90.4% · higher than 100% of CVEs
Exploited in the wildYes
CISA KEVListed Oct 5, 2023
Federal remediation dueOct 26, 2023
Ransomware campaign useKnown
Affected products
Which versions
WS
WS_FTP Server · Progress Software Corporation
8.8.0 before 8.8.2; 8.7.0 before 8.7.4 · source: vendor, KEV
WF
WS Ftp Server · Progress
before 8.7.4; 8.8 before 8.8.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-40044
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-40044
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
product
https://www.progress.com/ws_ftp
vendor-advisory
https://community.progress.com/s/article/WS-FTP-Server-Critical-Vulnerability-September-2023
www.theregister.com
https://www.theregister.com/2023/10/02/ws_ftp_update/
www.rapid7.com
https://www.rapid7.com/blog/post/2023/09/29/etr-critical-vulnerabilities-in-ws_ftp-server/
attackerkb.com
https://attackerkb.com/topics/bn32f9sNax/cve-2023-40044
censys.com
https://censys.com/cve-2023-40044/