Unauthenticated session hijacking via predictable identifiers
Published Apr 12, 2022 · Updated Aug 3, 2024
Authentication bypass in Siemens SCALANCE switches before 4.1.4 allows remote attackers to hijack active web sessions. The embedded web server generates session identifiers and nonces with insufficient randomness, making valid values susceptible to brute-force prediction. An existing user session is required; takeover grants that session's permissions over device configuration and operation.
Summary
What happened
Authentication bypass in Siemens SCALANCE switches before 4.1.4 allows remote attackers to hijack active web sessions. The embedded web server generates session identifiers and nonces with insufficient randomness, making valid values susceptible to brute-force prediction. An existing user session is required; takeover grants that session's permissions over device configuration and operation.
The record
- CVE
- CVE-2022-25752
- Published
- Apr 12, 2022
- Updated
- Aug 3, 2024
- Vendor
- Siemens
- Product
- SCALANCE X307-2 EEC (2x 230V)
- Classifications
- CWE-330, T1539, T1550.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 12, 2022CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=All versions < V4.1.4
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo