CVE-2026-21900
CryptoLib provides a software-only solution using the CCSDS Space Data Link Security Protocol - Extended Procedures (SDLS-EP) to secure communications between …
Impact
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 version 1.4.3, an out-of-bounds heap read vulnerability in cryptography_encrypt() occurs when parsing JSON metadata from KMC server responses. The flawed strtok iteration pattern uses ptr + strlen(ptr) + 1 which reads one byte past allocated buffer boundaries when processing short or malformed metadata strings. This issue has been patched in version 1.4.3.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Nasa | Cryptolib | before 1.4.3 |
Weakness classification
References
- NVD record
- CVE.org record
- https://github.com/nasa/CryptoLib/commit/2372efd3da1ccb226b4297222e25f41ecc84821d
- https://github.com/nasa/CryptoLib/releases/tag/v1.4.3
- https://github.com/nasa/CryptoLib/security/advisories/GHSA-4g6v-36fv-qcvw
- https://github.com/nasa/CryptoLib/security/advisories/GHSA-4g6v-36fv-qcvw