fkie_cve-2024-23184
Vulnerability from fkie_nvd
Published
2024-09-10 15:15
Modified
2024-11-21 08:57
Severity ?
5.0 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N
Summary
Having a large number of address headers (From, To, Cc, Bcc, etc.) becomes excessively CPU intensive. With 100k header lines CPU usage is already 12 seconds, and in a production environment we observed 500k header lines taking 18 minutes to parse. Since this can be triggered by external actors sending emails to a victim, this is a security issue. An external attacker can send specially crafted messages that consume target system resources and cause outage. One can implement restrictions on address headers on MTA component preceding Dovecot. No publicly available exploits are known.
References
security@open-xchange.comhttps://documentation.open-xchange.com/dovecot/security/advisories/csaf/2024/oxdc-adv-2024-0002.json
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2024/Aug/17
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2024/08/15/3
Impacted products
Vendor Product Version


To clipboard 

{
   cveTags: [],
   descriptions: [
      {
         lang: "en",
         value: "Having a large number of address headers (From, To, Cc, Bcc, etc.) becomes excessively CPU intensive. With 100k header lines CPU usage is already 12 seconds, and in a production environment we observed 500k header lines taking 18 minutes to parse. Since this can be triggered by external actors sending emails to a victim, this is a security issue. An external attacker can send specially crafted messages that consume target system resources and cause outage. One can implement restrictions on address headers on MTA component preceding Dovecot. No publicly available exploits are known.",
      },
      {
         lang: "es",
         value: "Tener una gran cantidad de encabezados de direcciones (De, Para, Cc, Cco, etc.) hace que el uso de la CPU sea excesivamente intensivo. Con 100.000 líneas de encabezado, el uso de la CPU ya es de 12 segundos, y en un entorno de producción observamos que 500.000 líneas de encabezado tardaban 18 minutos en analizarse. Dado que esto puede ser provocado por actores externos que envían correos electrónicos a una víctima, se trata de un problema de seguridad. Un atacante externo puede enviar mensajes especialmente manipulados que consumen recursos del sistema de destino y provocan una interrupción del servicio. Se pueden implementar restricciones en los encabezados de direcciones en el componente MTA anterior a Dovecot. No se conocen exploits disponibles públicamente.",
      },
   ],
   id: "CVE-2024-23184",
   lastModified: "2024-11-21T08:57:08.740",
   metrics: {
      cvssMetricV31: [
         {
            cvssData: {
               attackComplexity: "LOW",
               attackVector: "NETWORK",
               availabilityImpact: "NONE",
               baseScore: 5,
               baseSeverity: "MEDIUM",
               confidentialityImpact: "NONE",
               integrityImpact: "LOW",
               privilegesRequired: "LOW",
               scope: "CHANGED",
               userInteraction: "NONE",
               vectorString: "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N",
               version: "3.1",
            },
            exploitabilityScore: 3.1,
            impactScore: 1.4,
            source: "security@open-xchange.com",
            type: "Secondary",
         },
      ],
   },
   published: "2024-09-10T15:15:14.763",
   references: [
      {
         source: "security@open-xchange.com",
         url: "https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2024/oxdc-adv-2024-0002.json",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         url: "http://seclists.org/fulldisclosure/2024/Aug/17",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         url: "http://www.openwall.com/lists/oss-security/2024/08/15/3",
      },
   ],
   sourceIdentifier: "security@open-xchange.com",
   vulnStatus: "Awaiting Analysis",
   weaknesses: [
      {
         description: [
            {
               lang: "en",
               value: "CWE-770",
            },
         ],
         source: "security@open-xchange.com",
         type: "Secondary",
      },
   ],
}


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