CVE-2021-42856 Reflected Cross-site Scripting at DsaDataTest
Attackers can execute arbitrary scripts in user browsers via the DsaDataTest endpoint due to lack of input validation on the Metric parameter.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-42856?
CVE-2021-42856 is a medium-severity cross-site scripting vulnerability in Aternity SteelCentral AppInternals Dynamic Sampling Agent, published on 9 Mar 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
It was discovered that the /DsaDataTest endpoint is susceptible to Cross-site scripting (XSS) attack. It was noted that the Metric parameter does not have any input checks on the user input that allows an attacker to craft its own malicious payload to trigger a XSS vulnerability.
Which versions are affected by CVE-2021-42856?
It affects 1 product.
Products include Riverbed Steelcentral Appinternals Dynamic Sampling Agent.
How do I fix CVE-2021-42856?
No fix has been published for CVE-2021-42856 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2021-42856 being exploited?
There is no known exploitation of CVE-2021-42856 in the wild and no public exploit code.
Other vulnerabilities in Aternity SteelCentral AppInternals Dynamic Sampling Agent
- CVE-2021-42786 Remote Code Execution at AgentControllerServlet
- CVE-2021-42854 Directory Traversal Read/Write/Delete at PluginServlet
- CVE-2021-42787 Directory Traversal Write/Delete/Partial Read at AgentConfigurationServlet
- CVE-2021-42853 Directory Traversal Delete/Read at AgentDiagnosticServlet
- CVE-2021-42855 Local privilege escalation due to misconfigured write permission on .debug_command.config file
Sources
Also known as GHSA-4gxc-qfxh-4hf6.