CVE-2021-42021 Path traversal in Siveillance Video DLNA Server

High 7.5 Published 9 Nov 2021 Updated 4 Aug 2024

An unauthenticated remote attacker can exploit a path traversal flaw to read arbitrary files outside the web directory, exposing sensitive information.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-42021?

CVE-2021-42021 is a high-severity path traversal vulnerability in Siemens Siveillance Video DLNA Server, published on 9 Nov 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability has been identified in Siveillance Video DLNA Server (2019 R1), Siveillance Video DLNA Server (2019 R2), Siveillance Video DLNA Server (2019 R3), Siveillance Video DLNA Server (2020 R1), Siveillance Video DLNA Server (2020 R2), Siveillance Video DLNA Server (2020 R3), Siveillance Video DLNA Server (2021 R1). The affected application contains a path traversal vulnerability that could allow to read arbitrary files on the server that are outside the application’s web document directory. An unauthenticated remote attacker could exploit this issue to access sensitive information for subsequent attacks.

Weakness: CWE-22, CWE-26

Which versions are affected by CVE-2021-42021?

It affects 5 products.

Products include Siemens Siveillance Video Management Software 2019 R1, Siemens Siveillance Video Management Software 2019 R2, Siemens Siveillance Video Management Software 2019 R3, Siemens Siveillance Video Management Software 2020 R1, Siemens Siveillance Video Management Software 2020 R2.

How do I fix CVE-2021-42021?

No fix has been published for CVE-2021-42021 yet. Limit exposure of the affected software until one is available.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2021-42021 being exploited?

There is no known exploitation of CVE-2021-42021 in the wild and no public exploit code.

Sources

Also known as GHSA-p86h-xf2r-jw9g.