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CVE-2025-30356— Heap Buffer Overflow via Incomplete Length Check in `Crypto_TC_ApplySecurity`

Quick assessment

Affected
nasa CryptoLib
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

CryptoLib是NASA开源的一个应用程序。用于使用 CCSDS 空间数据链路安全协议提供纯软件解决方案。 CryptoLib 1.3.3及之前版本存在数字错误漏洞，该漏洞源于Crypto_TC_ApplySecurity函数中的fl字段验证不完整，可能导致堆缓冲区溢出。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.62% · P47

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-30356

Vulnerability Information
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Vulnerability Title
Heap Buffer Overflow via Incomplete Length Check in `Crypto_TC_ApplySecurity`
Source: CVE Program / CVE List V5
Vulnerability 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. 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
整数下溢(超界折返)
Source: CVE Program / CVE List V5
Vulnerability Title
CryptoLib 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CryptoLib是NASA开源的一个应用程序。用于使用 CCSDS 空间数据链路安全协议提供纯软件解决方案。 CryptoLib 1.3.3及之前版本存在数字错误漏洞，该漏洞源于Crypto_TC_ApplySecurity函数中的fl字段验证不完整，可能导致堆缓冲区溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
nasa CryptoLib <= 1.3.3 -

II. Public POCs for CVE-2025-30356

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III. Intelligence Information for CVE-2025-30356

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Vendor Advisories for CVE-2025-30356 (1)

IV. Related Vulnerabilities

Same product: CryptoLib
Same vendor: nasa
Same weakness: CWE-191

V. Comments for CVE-2025-30356

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