CVE-2026-21899

{"id": "CVE-2026-21899", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-21899", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-01-12T20:22:54.955002Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.7, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "HIGH", "confidentialityImpact": "LOW"}, "impactScore": 3.4, "exploitabilityScore": 1.2}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.9, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.2}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "nasa", "product": "CryptoLib", "versions": [{"status": "affected", "version": "< 1.4.3"}]}]}], "published": "2026-01-10T01:16:18.113", "references": [{"url": "https://github.com/nasa/CryptoLib/releases/tag/v1.4.3", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/nasa/CryptoLib/security/advisories/GHSA-wc29-5hw7-mpj8", "tags": ["Exploit", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-125"}]}], "descriptions": [{"lang": "en", "value": "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 version 1.4.3, in base64urlDecode, padding-stripping dereferences input[inputLen - 1] before checking that inputLen > 0 or that input != NULL. For inputLen == 0, this becomes an OOB read at input[-1], potentially crashing the process. If input == NULL and inputLen == 0, it dereferences NULL - 1. This issue has been patched in version 1.4.3."}, {"lang": "es", "value": "CryptoLib proporciona una soluci\u00f3n \u00fanicamente de software utilizando el Protocolo de Seguridad de Enlace de Datos Espaciales CCSDS - Procedimientos Extendidos (SDLS-EP) para asegurar las comunicaciones entre una nave espacial que ejecuta el Sistema de Vuelo central (cFS) y una estaci\u00f3n terrestre. Antes de la versi\u00f3n 1.4.3, en base64urlDecode, la eliminaci\u00f3n de relleno desreferencia input[inputLen - 1] antes de verificar que inputLen &gt; 0 o que input != NULL. Para inputLen == 0, esto se convierte en una lectura fuera de l\u00edmites (OOB read) en input[-1], lo que podr\u00eda bloquear el proceso. Si input == NULL e inputLen == 0, desreferencia NULL - 1. Este problema ha sido parcheado en la versi\u00f3n 1.4.3."}], "lastModified": "2026-06-17T10:19:06.903", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:nasa:cryptolib:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AE1BE91E-2901-42AF-BC66-762CFA7A2582", "versionEndExcluding": "1.4.3"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}