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


WS_FTP FLAW CVE-2023-40044 ACTIVELY EXPLOITED IN THE WILD

Pierluigi Paganini October 02, 2023



EXPERTS WARN OF THREAT ACTORS ACTIVELY EXPLOITING CVE-2023-40044 FLAW IN
RECENTLY DISCLOSED FLAW IN PROGRESS SOFTWARE’S WS_FTP PRODUCTS.

Progress Software recently warned customers to address a critical severity
vulnerability, tracked as CVE-2023-40044 (CVSS score 10), in its WS_FTP Server
software which is used by thousands of IT teams worldwide. The vulnerability was
discovered by researchers at the cybersecurity firm Assetnote.

“The WS_FTP team recently discovered vulnerabilities in the WS_FTP Server Ad hoc
Transfer Module and in the WS_FTP Server manager interface. All versions of
WS_FTP Server are affected by these vulnerabilities.” reads the advisory from
the vendor

Ad

A pre-authenticated, remote attacker could leverage a .NET deserialization issue
in the Ad Hoc Transfer module to execute arbitrary commands on the underlying
WS_FTP Server operating system.  

“Ultimately, we discovered that the vulnerability could be triggered without any
authentication, and it affected the entire Ad Hoc Transfer component of WS_FTP.
It was a bit shocking that we were able to reach the deserialization sink
without any authentication.” reads the advisory published by Assetnote.

The issue affects WS_FTP Server versions prior to 8.7.4 and 8.8.2.

Assetnote researchers discovered about 2.9k hosts exposed on the internet that
are running WS_FTP, they also published a PoC exploit for this vulnerability.

“This vulnerability turned out to be relatively straight forward and represented
a typical .NET deserialization issue that led to RCE. It’s surprising that this
bug has stayed alive for so long, with the vendor stating that most versions of
WS_FTP are vulnerable.” continues Assetnote. “From our analysis of WS_FTP, we
found that there are about 2.9k hosts on the internet that are running WS_FTP
(and also have their webserver exposed, which is necessary for exploitation).
Most of these online assets belong to large enterprises, governments and
educational institutions.”

Cybersecurity firm Rapid7 reported that threat actors started exploiting the
CVE-2023-40044 flaw shortly after the release of the PoC code by Assetnote.

“As of September 30, Rapid7 has observed multiple instances of WS_FTP
exploitation in the wild.” reads the report published by Rapid7. “In the evening
hours of September 30, 2023, Rapid7 observed what appears to be exploitation of
one or more recently disclosed WS_FTP vulnerabilities in multiple customer
environments. Individual alerts our team responded to occurred within minutes of
one another between 2023-10-01 01:38:43 UTC and 01:41:38 UTC. The process
execution chain looks the same across all observed instances, indicating
possible mass exploitation of vulnerable WS_FTP servers.”

Follow me on Twitter: @securityaffairs and Facebook and Mastodon

Pierluigi Paganini

(SecurityAffairs – hacking, Progress Software)

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RECENT ARTICLES

WS_FTP FLAW CVE-2023-40044 ACTIVELY EXPLOITED IN THE WILD

Hacking / October 02, 2023



NATIONAL LOGISTICS PORTAL (NLP) DATA LEAK: SEAPORTS IN INDIA WERE LEFT
VULNERABLE TO TAKEOVER BY HACKERS

Data Breach / October 02, 2023



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APT / October 02, 2023



RANSOMWARE ATTACK ON JOHNSON CONTROLS MAY HAVE EXPOSED SENSITIVE DHS DATA

Data Breach / October 02, 2023



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CARE

Cyber Crime / October 01, 2023



To contact me write an email to:

Pierluigi Paganini :
pierluigi.paganini@securityaffairs.co

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