CVE-2025-29912: CryptoLib Has Heap Buffer Overflow Due to Unsigned Integer Underflow in Crypto_TC_ProcessSecurity
First published: Mon Mar 17 2025(Updated: )
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 versions 1.3.3 and prior, an unsigned integer underflow in the `Crypto_TC_ProcessSecurity` function of CryptoLib leads to a heap buffer overflow. The vulnerability is triggered when the `fl` (frame length) field in a Telecommand (TC) packet is set to 0. This underflow causes the frame length to be interpreted as 65535, resulting in out-of-bounds memory access. This critical vulnerability can be exploited to cause a denial of service (DoS) or potentially achieve remote code execution. Users of CryptoLib are advised to apply the recommended patch or avoid processing untrusted TC packets until a fix is available.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| CryptoLib | <1.3.3 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2025-29912?
CVE-2025-29912 has been classified as a moderate severity vulnerability due to its potential impact on secure communications.
How do I fix CVE-2025-29912?
To mitigate CVE-2025-29912, upgrade CryptoLib to version 1.3.4 or later.
What versions of CryptoLib are affected by CVE-2025-29912?
CVE-2025-29912 affects CryptoLib versions up to 1.3.3, and any version prior.
What type of vulnerability is CVE-2025-29912?
CVE-2025-29912 is a cryptographic vulnerability related to unsigned integer handling in the CCSDS SDLS Protocol.
What could happen if CVE-2025-29912 is exploited?
Exploitation of CVE-2025-29912 could compromise the security of communications between spacecraft and ground stations.
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