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Siemens Siveillance Video DLNA Server

Plan Patch8.6ICS-CERT ICSA-21-315-13Nov 9, 2021
Attack VectorNetwork
Auth RequiredNone
ComplexityLow
User InteractionNone needed
Summary

A path traversal vulnerability in Siemens Siveillance Video DLNA Server allows an authenticated remote attacker to access sensitive information on the DLNA server by using directory traversal sequences in requests. The vulnerability affects versions 2019 R1 through 2021 R1. Siemens has released hotfixes that should be applied to all affected installations. No public exploits are known at this time.

What this means
What could happen
An authenticated attacker with access to the DLNA server could read sensitive files and recorded video data through a path traversal flaw, potentially exposing security camera recordings and system configuration details.
Who's at risk
Security and surveillance operators using Siemens Siveillance Video DLNA Server for camera management and video recording. Affects municipalities, utilities, airports, and other facilities that rely on networked video surveillance infrastructure for physical security monitoring.
How it could be exploited
An attacker with valid DLNA credentials sends a specially crafted request with path traversal sequences (e.g., ../) to the DLNA server interface. The server fails to validate the request path and grants access to files outside the intended directory. The attacker can then download video archives, configuration files, or other sensitive data stored on the server.
Prerequisites
  • Valid DLNA user credentials
  • Network access to the DLNA server port
  • Knowledge of the DLNA server's file structure or common paths
Requires valid credentialsAffects surveillance system confidentialityPaths to sensitive recorded data
Exploitability
Low exploit probability (EPSS 1.0%)
Affected products (1)
ProductAffected VersionsFix Status
Siveillance Video DLNA Server2019 R1; 2019 R2; 2019 R3 and 4 moreNo fix yet
Remediation & Mitigation
0/4
Do now
0/1
WORKAROUNDRestrict network access to the DLNA server using firewall rules; allow connections only from authorized management workstations and authorized DLNA client systems
Schedule — requires maintenance window
0/1

Patching may require device reboot — plan for process interruption

HOTFIXApply hotfix using the latest available DLNA Server installer for your version (2019 R1/R2/R3, 2020 R1/R2/R3, or 2021 R1)
Long-term hardening
0/2
HARDENINGSegment the DLNA server behind a firewall or VLAN separate from business networks and the Internet
HARDENINGEnforce strong authentication for DLNA user accounts and audit user access logs regularly
View full CISA ICS-CERT advisory
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