Which versions of Cryptolib are affected by CVE-2025-29911?

CVE-2025-29911 presents significant security risk, a heap-based buffer overflow vulnerability rated CVSS 8.9.

Is there a public PoC exploit available for CVE-2025-29911?

Yes, a public proof-of-concept exploit is available for CVE-2025-29911. Prioritise patching immediately. EPSS: 0.5%.

How to fix or mitigate CVE-2025-29911?

Within 7 days: Identify all affected systems and apply vendor patches promptly. If patching is delayed, consider network segmentation to limit exposure.

Cryptolib CVE-2025-29911

Q: What is the CVSS score of CVE-2025-29911?

CVE-2025-29911 has a CVSS 4.0 base score of 8.9 (High). CVSS vector: 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/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.5%.

HIGH

Heap-based Buffer Overflow (CWE-122)

2025-03-17 security-advisories@github.com

Buffer Overflow Heap Overflow RCE Denial Of Service Cryptolib

8.9

CVSS 4.0 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

8.9 HIGH

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/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

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/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:31 vuln.today

PoC Detected

Apr 30, 2025 - 16:08 vuln.today

Public exploit code

CVE Published

Mar 17, 2025 - 23:15 nvd

HIGH 8.9

DescriptionGitHub Advisory

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. A critical heap buffer overflow vulnerability was identified in the Crypto_AOS_ProcessSecurity function of CryptoLib versions 1.3.3 and prior. This vulnerability allows an attacker to trigger a Denial of Service (DoS) or potentially execute arbitrary code (RCE) by providing a maliciously crafted AOS frame with an insufficient length. The vulnerability lies in the function Crypto_AOS_ProcessSecurity, specifically during the processing of the Frame Error Control Field (FECF). The affected code attempts to read from the p_ingest buffer at indices current_managed_parameters_struct.max_frame_size - 2 and current_managed_parameters_struct.max_frame_size - 1 without verifying if len_ingest is sufficiently large. This leads to a heap buffer overflow when len_ingest is smaller than max_frame_size. As of time of publication, no known patched versions exist.

AnalysisAI

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. Rated high severity (CVSS 8.9), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-122. 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. A critical heap buffer overflow vulnerability was identified in the Crypto_AOS_ProcessSecurity function of CryptoLib versions 1.3.3 and prior. This vulnerability allows an attacker to trigger a Denial of Service (DoS) or potentially execute arbitrary code (RCE) by providing a maliciously crafted AOS frame with an insufficient length. The vulnerability lies in the function Crypto_AOS_ProcessSecurity, specifically during the processing of the Frame Error Control Field (FECF). The affected code attempts to read from the p_ingest buffer at indices current_managed_parameters_struct.max_frame_size - 2 and current_managed_parameters_struct.max_frame_size - 1 without verifying if len_ingest is sufficiently large. This leads to a heap buffer overflow when len_ingest is smaller than max_frame_size. As of time of publication, no known patched versions exist. Affected products include: Nasa Cryptolib.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.