Authenticated process crash via oversized TLV key count
Published Oct 30, 2025 · Updated Oct 30, 2025
Stack-based buffer overflow in NASA CryptoLib before 1.4.2 allows remote authenticated users to crash its host process with a malformed TLV packet. Crypto_Key_update() divides the attacker-controlled pdu_len by two and writes that many key IDs into the fixed 98-entry stack array kblk without bounding the loop. Reachability requires a deployment that passes attacker-supplied SDLS key-update packets to the library; the demonstrated consequence is a process crash, while code execution depends on stack layout.
Summary
What happened
Stack-based buffer overflow in NASA CryptoLib before 1.4.2 allows remote authenticated users to crash its host process with a malformed TLV packet. Crypto_Key_update() divides the attacker-controlled pdu_len by two and writes that many key IDs into the fixed 98-entry stack array kblk without bounding the loop. Reachability requires a deployment that passes attacker-supplied SDLS key-update packets to the library; the demonstrated consequence is a process crash, while code execution depends on stack layout.
The record
- CVE
- CVE-2025-64096
- Published
- Oct 30, 2025
- Updated
- Oct 30, 2025
- Vendor
- NASA
- Product
- CryptoLib
- Classifications
- CWE-121
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 30, 2025CVE publishedPublication date reported by the CVE source.
- Oct 30, 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=< 1.4.2
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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Weakness, pattern, technique
Public exploit references
- GHSA-w6c3-pxvr-6m6j malformed TC packet proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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