cve-2021-30639
Vulnerability from cvelistv5
Published
2021-07-12 14:55
Modified
2024-08-03 22:40
Severity ?
Summary
A vulnerability in Apache Tomcat allows an attacker to remotely trigger a denial of service. An error introduced as part of a change to improve error handling during non-blocking I/O meant that the error flag associated with the Request object was not reset between requests. This meant that once a non-blocking I/O error occurred, all future requests handled by that request object would fail. Users were able to trigger non-blocking I/O errors, e.g. by dropping a connection, thereby creating the possibility of triggering a DoS. Applications that do not use non-blocking I/O are not exposed to this vulnerability. This issue affects Apache Tomcat 10.0.3 to 10.0.4; 9.0.44; 8.5.64.
References
security@apache.orghttps://kc.mcafee.com/corporate/index?page=content&id=SB10366Third Party Advisory
security@apache.orghttps://lists.apache.org/thread.html/r79a7c019712b39aedf7cf4da9276d80610f04441b2a4f6506cb2daaf%40%3Cdev.tomcat.apache.org%3E
security@apache.orghttps://lists.apache.org/thread.html/r79a7c019712b39aedf7cf4da9276d80610f04441b2a4f6506cb2daaf%40%3Cusers.tomcat.apache.org%3E
security@apache.orghttps://lists.apache.org/thread.html/rd84fae1f474597bdf358f5bdc0a5c453c507bd527b83e8be6b5ea3f4%40%3Cannounce.tomcat.apache.org%3EMailing List, Vendor Advisory
security@apache.orghttps://security.gentoo.org/glsa/202208-34Third Party Advisory
security@apache.orghttps://security.netapp.com/advisory/ntap-20210827-0007/Third Party Advisory
security@apache.orghttps://www.oracle.com/security-alerts/cpujan2022.htmlPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://kc.mcafee.com/corporate/index?page=content&id=SB10366Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.apache.org/thread.html/r79a7c019712b39aedf7cf4da9276d80610f04441b2a4f6506cb2daaf%40%3Cdev.tomcat.apache.org%3E
af854a3a-2127-422b-91ae-364da2661108https://lists.apache.org/thread.html/r79a7c019712b39aedf7cf4da9276d80610f04441b2a4f6506cb2daaf%40%3Cusers.tomcat.apache.org%3E
af854a3a-2127-422b-91ae-364da2661108https://lists.apache.org/thread.html/rd84fae1f474597bdf358f5bdc0a5c453c507bd527b83e8be6b5ea3f4%40%3Cannounce.tomcat.apache.org%3EMailing List, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202208-34Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20210827-0007/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.oracle.com/security-alerts/cpujan2022.htmlPatch, Third Party Advisory
Impacted products
Vendor Product Version
Apache Software Foundation Apache Tomcat Version: Apache Tomcat 10 10.0.3 to 10.0.4
Version: Apache Tomcat 9 9.0.44
Version: Apache Tomcat 8.5 8.5.64
Create a notification for this product.
Show details on NVD website


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         sourceIdentifier: "security@apache.org",
         vulnStatus: "Modified",
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      },
      nvd: "{\"cve\":{\"id\":\"CVE-2021-30639\",\"sourceIdentifier\":\"security@apache.org\",\"published\":\"2021-07-12T15:15:08.333\",\"lastModified\":\"2024-11-21T06:04:20.727\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A vulnerability in Apache Tomcat allows an attacker to remotely trigger a denial of service. An error introduced as part of a change to improve error handling during non-blocking I/O meant that the error flag associated with the Request object was not reset between requests. This meant that once a non-blocking I/O error occurred, all future requests handled by that request object would fail. Users were able to trigger non-blocking I/O errors, e.g. by dropping a connection, thereby creating the possibility of triggering a DoS. Applications that do not use non-blocking I/O are not exposed to this vulnerability. This issue affects Apache Tomcat 10.0.3 to 10.0.4; 9.0.44; 8.5.64.\"},{\"lang\":\"es\",\"value\":\"Una vulnerabilidad en Apache Tomcat permite a un atacante desencadenar remotamente una denegación de servicio. Un error introducido como parte de un cambio para mejorar el manejo de errores durante la I/O sin bloqueo significaba que el flag de error asociado al objeto Request no se restablecía entre peticiones. Esto significaba que una vez que se producía un error de I/O sin bloqueo, todas las futuras peticiones manejadas por ese objeto de petición podrían producir un fallo. Unos usuarios podían desencadenar errores de I/O sin bloqueo, por ejemplo, abandonando una conexión, creando así la posibilidad de desencadenar una DoS. Las aplicaciones que no usan I/O sin bloqueo no están expuestas a esta vulnerabilidad. 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   },
}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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