Secret disclosure via HTTP response-length oracle
Published Jun 14, 2022 · Updated Apr 21, 2025
Information disclosure in Siemens SINEMA Remote Connect Server before 3.1 allows man-in-the-middle attackers to recover secrets. HTTP-over-TLS responses expose length differences when attacker-controlled URL guesses match secret strings in response bodies. Exploitation requires an adversary-in-the-middle position and repeated chosen-plaintext requests; it discloses plaintext secrets without altering data or service availability.
Summary
What happened
Information disclosure in Siemens SINEMA Remote Connect Server before 3.1 allows man-in-the-middle attackers to recover secrets. HTTP-over-TLS responses expose length differences when attacker-controlled URL guesses match secret strings in response bodies. Exploitation requires an adversary-in-the-middle position and repeated chosen-plaintext requests; it discloses plaintext secrets without altering data or service availability.
The record
- CVE
- CVE-2022-27221
- Published
- Jun 14, 2022
- Updated
- Apr 21, 2025
- Vendor
- Siemens
- Product
- SINEMA Remote Connect Server
- Classifications
- CWE-203, T1557
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 14, 2022CVE publishedPublication date reported by the CVE source.
- Apr 21, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=0 <V3.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
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Your stack
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