CVE-2020-25239 Missing authorization in SINEMA Remote Connect Server

High 8.8 Published Updated

An attacker with unprivileged user rights can modify authorization server settings to add a rogue server, bypassing security controls.

Exploited in the wild
Not known
Login needed
Any signed-in user
Attackable
Over the internet
Victim action needed
Not needed
Fix
None listed

What is CVE-2020-25239?

CVE-2020-25239 is a high-severity missing authorization vulnerability in Siemens Sinema Remote Connect Server, published on 15 Mar 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability has been identified in SINEMA Remote Connect Server (All versions < V3.0). The webserver could allow unauthorized actions via special urls for unpriviledged users. The settings of the UMC authorization server could be changed to add a rogue server by an attacker authenticating with unprivilege user rights.

Weakness: CWE-863

Which versions are affected by CVE-2020-25239?

It affects 1 product.

Products include Siemens Sinema Remote Connect Server.

How do I fix CVE-2020-25239?

No fix has been published for CVE-2020-25239 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2020-25239 being exploited?

There is no known exploitation of CVE-2020-25239 in the wild and no public exploit code.

All Siemens Sinema Remote Connect Server vulnerabilities

Sources

Also known as GHSA-fp4f-m8g2-6548.

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