CVE-2025-30356
CryptoLib provides a software-only solution using the CCSDS Space Data Link Security Protocol - Extended Procedures (SDLS-EP) to secure communications between a spacecraft running the core Flight System (cFS) and a ground station. In 1.3.3 and earlier, a heap buffer overflow vulnerability persists in the Crypto_TC_ApplySecurity function due to an incomplete validation check on the fl (frame length) field. Although CVE-2025-29912 addressed an underflow issue involving fl, the patch fails to fully prevent unsafe calculations. As a result, an attacker can still craft malicious frames that cause a negative tf_payload_len, which is then interpreted as a large unsigned value, leading to a heap buffer overflow in a memcpy call.
https://nvd.nist.gov/vuln/detail/CVE-2025-30356
Categories
CWE-191 : Integer Underflow (Wrap or Wraparound)
This can happen in signed and unsigned cases.
References
CPE
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REMEDIATION
EXPLOITS
Exploit-db.com
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POC Github
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Other Nist (github, ...)
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CAPEC
Common Attack Pattern Enumerations and Classifications
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