CVE-2025-64096: cryptolib Stack Overflow

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.

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CVSS v3.1 Score

8.8

HIGH

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-121 CWE-121

Affected Products

Vendor	Product	Versions
nasa	cryptolib	< 1.4.2

References

Advisories & Patches

https://github.com/nasa/CryptoLib/security/advisories/GHSA-w6c3-pxvr-6m6j https://github.com/nasa/CryptoLib/security/advisories/GHSA-w6c3-pxvr-6m6j

Exploits

https://github.com/nasa/CryptoLib/security/advisories/GHSA-w6c3-pxvr-6m6j https://github.com/nasa/CryptoLib/security/advisories/GHSA-w6c3-pxvr-6m6j

Frequently Asked Questions

What is CVE-2025-64096? +

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. It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2025-64096? +

CVE-2025-64096 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-64096? +

CVE-2025-64096 affects products from nasa, specifically: cryptolib. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-64096? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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