---
cve: "CVE-2025-30356"
severity: "CRITICAL"
cvss: 9.3
epss: "62%"
vendor: "NASA"
kev: false
exploited: false
published: "2025-04-01 22:15:21"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-03T11:46:11+02:00"
---

# CVE-2025-30356

> 9.3 CRITICAL · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 0d58c9a8cb9f7e96d67858d7ac125daaec0ca299 (Commit)
- 59d1bce7608c94c6131ef4877535075b0649799c (Commit)

## Referenzen

- <https://github.com/nasa/CryptoLib/security/advisories/GHSA-6w2x-w7w3-85w2>
- <https://github.com/nasa/CryptoLib/commit/59d1bce7608c94c6131ef4877535075b0649799c>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2025-30356) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_