CVE-2025-64096
CryptoLib vulnerable to Stack Buffer Overflow in Crypto_Key_Update due to missing TLV length check
- State
- Published
- Severity
- 8.8 High
- Published
- Oct 30, 2025
- Updated
- Jan 9, 2026
- Reserved
- Oct 27, 2025
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. Prior 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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.0 | 8.8 High | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | GitHub_M |
Weaknesses
- CWE-121 Stack-based Buffer Overflow
Affected Products
| Product | Versions |
|---|---|
CryptoLibnasa |
|
References
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