CVE-2024-10907
In lm-sys/fastchat Release v0.2.36, the server fails to handle excessive characters appended to the end of multipart boundaries. This flaw can be exploited by sending malformed multipart requests with arbitrary characters at the end of the boundary. Each extra character is processed in an infinite loop, leading to excessive resource consumption and a complete denial of service (DoS) for all users. The vulnerability is unauthenticated, meaning no user login or interaction is required for an attacker to exploit this issue.
CVSS
- Versión: 3.0
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 7.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.69%
- Percentil entre todas las CVEs puntuadas: 51
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1190Exploit Public-Facing Applicationinitial access95 % - Impacto principal
T1499.004Application or System Exploitationimpact90 %
Vector AV:N/AC:L/PR:N sin UI indica acceso remoto sin autenticación (T1190). CWE-835 (bucle infinito) + descripción de consumo excesivo de recursos causa DoS completo (T1499.004).
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (1)
CWE
- CWE-835
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2024-10907",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2024-10907",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "poc"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2025-03-20T17:52:00.670067Z"
}
}
],
"cvssMetricV30": [
{
"type": "Secondary",
"source": "security@huntr.dev",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.0",
"baseScore": 7.5,
"attackVector": "NETWORK",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "NONE"
},
"impactScore": 3.6,
"exploitabilityScore": 3.9
}
]
},
"affected": [
{
"source": "security@huntr.dev",
"affectedData": [
{
"vendor": "lm-sys",
"product": "lm-sys/fastchat",
"versions": [
{
"status": "affected",
"version": "unspecified",
"versionType": "custom",
"lessThanOrEqual": "latest"
}
]
}
]
}
],
"published": "2025-03-20T10:15:21.357",
"references": [
{
"url": "https://huntr.com/bounties/bf3ca81d-3508-4455-95d9-0b653e46d6e4",
"tags": [
"Exploit",
"Third Party Advisory"
],
"source": "security@huntr.dev"
}
],
"vulnStatus": "Modified",
"weaknesses": [
{
"type": "Secondary",
"source": "security@huntr.dev",
"description": [
{
"lang": "en",
"value": "CWE-835"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In lm-sys/fastchat Release v0.2.36, the server fails to handle excessive characters appended to the end of multipart boundaries. This flaw can be exploited by sending malformed multipart requests with arbitrary characters at the end of the boundary. Each extra character is processed in an infinite loop, leading to excessive resource consumption and a complete denial of service (DoS) for all users. The vulnerability is unauthenticated, meaning no user login or interaction is required for an attacker to exploit this issue."
},
{
"lang": "es",
"value": "En la versión v0.2.36 de lm-sys/fastchat, el servidor no gestiona el exceso de caracteres añadidos al final de los límites multiparte. Esta vulnerabilidad puede explotarse enviando solicitudes multiparte malformadas con caracteres arbitrarios al final del límite. Cada carácter adicional se procesa en un bucle infinito, lo que provoca un consumo excesivo de recursos y una denegación de servicio (DoS) completa para todos los usuarios. La vulnerabilidad no está autenticada, lo que significa que un atacante no requiere que el usuario inicie sesión ni interactúe con él para explotarla."
}
],
"lastModified": "2026-06-17T06:56:40.303",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:lm-sys:fastchat:0.2.36:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "7EF59142-7680-44AA-8669-F1F545DCBEDE"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "security@huntr.dev"
}