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Vulnerability · Published Oct 15, 2024 · Assigned by SEC-VLab

CVE-2024-47945Predictable Session ID

Critical 9.1

In plain English

A critical-severity security flaw in IoT Interface & CMC III Processing Unit from RITTAL GmbH & Co. KG. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 59% of all known vulnerabilities).

Severity (CVSS 3.1)9.1Critical
Exploit odds (30 days)0.9%top 41.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

VendorProductVersions
RITTAL GmbH & Co. KG IoT Interface & CMC III Processing Unit <6.21.00.2

Weakness: CWE-340 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

References