CVE-2021-35242 is a vulnerability in SolarWinds Serv U
Published on December 6, 2021
A valid CSRF token is present in response to an invalid request
Serv-U server responds with valid CSRFToken when the request contains only Session.
Vulnerability Analysis
CVE-2021-35242 is exploitable with network access, requires user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
What is a Session Riding Vulnerability?
The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. When a web server is designed to receive a request from a client without any mechanism for verifying that it was intentionally sent, then it might be possible for an attacker to trick a client into making an unintentional request to the web server which will be treated as an authentic request. This can be done via a URL, image load, XMLHttpRequest, etc. and can result in exposure of data or unintended code execution.
CVE-2021-35242 has been classified to as a Session Riding vulnerability or weakness.
Products Associated with CVE-2021-35242
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Affected Versions
SolarWinds Serv-U Server:- Version 15.2.4 Hotfix 1 and previous versions and below 15.2.5 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.