CVE-2025-64096 – CryptoLib vulnerable to Stack Buffer Overflow in Crypto_Key_Update due to missing TLV length check

CVE ID : CVE-2025-64096

Published : Oct. 30, 2025, 5:09 p.m. | 17 minutes ago

Description : 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. Prier to 1.4.2, there is a missing bounds check in Crypto_Key_update() (crypto_key_mgmt.c) which allows a remote attacker to trigger a stack-based buffer overflow by supplying a TLV packet with a spoofed length field. The function calculates the number of keys from an attacker-controlled field (pdu_len), which may exceed the static array size (kblk[98]), leading to an out-of-bounds write and potential memory corruption. This vulnerability is fixed in 1.4.2.

Severity: 0.0 | NA

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