CVE-2026-4851

{"id": "CVE-2026-4851", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "published": "2026-03-29T01:15:56.967", "references": [{"url": "https://www.openwall.com/lists/oss-security/2026/03/26/6", "tags": ["Mailing List"], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}, {"url": "http://www.openwall.com/lists/oss-security/2026/03/26/6", "tags": ["Mailing List"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "description": [{"lang": "en", "value": "CWE-95"}, {"lang": "en", "value": "CWE-502"}]}], "descriptions": [{"lang": "en", "value": "GRID::Machine versions through 0.127 for Perl allows arbitrary code execution via unsafe deserialization.\n\nGRID::Machine provides Remote Procedure Calls (RPC) over SSH for Perl. The client connects to remote hosts to execute code on them. A compromised or malicious remote host can execute arbitrary code back on the client through unsafe deserialization in the RPC protocol.\n\nread_operation() in lib/GRID/Machine/Message.pm deserialises values from the remote side using eval()\n\n $arg .= '$VAR1';\n my $val = eval \"no strict; $arg\"; # line 40-41\n\n$arg is raw bytes from the protocol pipe. A compromised remote host can embed arbitrary perl in the Dumper-formatted response:\n\n $VAR1 = do { system(\"...\"); };\n\nThis executes on the client silently on every RPC call, as the return values remain correct.\n\nThis functionality is by design but the trust requirement for the remote host is not documented in the distribution."}, {"lang": "es", "value": "Las versiones de GRID::Machine hasta la 0.127 para Perl permiten ejecuci\u00f3n de c\u00f3digo arbitrario a trav\u00e9s de deserializaci\u00f3n insegura.\n\nGRID::Machine proporciona Llamadas a Procedimientos Remotos (RPC) sobre SSH para Perl. El cliente se conecta a hosts remotos para ejecutar c\u00f3digo en ellos. Un host remoto comprometido o malicioso puede ejecutar c\u00f3digo arbitrario de vuelta en el cliente a trav\u00e9s de deserializaci\u00f3n insegura en el protocolo RPC.\n\nread_operation() en lib/GRID/Machine/Message.pm deserializa valores del lado remoto usando eval()\n\n $arg .= '$VAR1';\n my $val = eval \"no strict; $arg\"; # l\u00ednea 40-41\n\n$arg son bytes en bruto de la tuber\u00eda del protocolo. Un host remoto comprometido puede incrustar Perl arbitrario en la respuesta con formato Dumper:\n\n $VAR1 = do { system(\"...\"); };\n\nEsto se ejecuta en el cliente silenciosamente en cada llamada RPC, ya que los valores de retorno permanecen correctos.\n\nEsta funcionalidad es intencional, pero el requisito de confianza para el host remoto no est\u00e1 documentado en la distribuci\u00f3n."}], "lastModified": "2026-04-01T15:23:23.980", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:casiano:grid\\:\\:machine:*:*:*:*:*:perl:*:*", "vulnerable": true, "matchCriteriaId": "B3148991-8DC2-4D2F-8EC2-0DCB0E5B6A63", "versionEndIncluding": "0.127"}], "operator": "OR"}]}], "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}