Memory disclosure and crash via invalid token lengths
Published Jun 28, 2024 · Updated Jul 14, 2026
Out-of-bounds reads in Siemens S7-1500 MFP firmware V3.1.5 and later allow attackers to crash GSS-using processes with malformed tokens. GSS unsealing code accepts inconsistent token lengths, reads beyond short plaintext, and confuses the header length with the complete ASN.1 token length. A crafted token must reach a GSS-using process; the resulting read can disclose adjacent process memory or terminate that process, without granting memory writes.
Summary
What happened
Out-of-bounds reads in Siemens S7-1500 MFP firmware V3.1.5 and later allow attackers to crash GSS-using processes with malformed tokens. GSS unsealing code accepts inconsistent token lengths, reads beyond short plaintext, and confuses the header length with the complete ASN.1 token length. A crafted token must reach a GSS-using process; the resulting read can disclose adjacent process memory or terminate that process, without granting memory writes.
The record
- CVE
- CVE-2024-37371
- Published
- Jun 28, 2024
- Updated
- Jul 14, 2026
- Vendor
- Siemens
- Product
- SIPLUS S7-1500 CPU 1518-4 PN/DP MFP
- Classifications
- CWE-125, T1499
- Attack vector
- network
- Privileges
- Unavailable
Timeline
How it unfolded
- Jun 28, 2024CVE publishedPublication date reported by the CVE source.
- Jul 14, 2026Record 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=V3.1.5 <*
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
Your stack
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Your stack
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