Vulnerability Details CVE-2021-30639
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.007
EPSS Ranking 71.7%
CVSS Severity
CVSS v3 Score 7.5
CVSS v2 Score 5.0
References
- https://kc.mcafee.com/corporate/index?page=content&id=SB10366
- https://lists.apache.org/thread.html/r79a7c019712b39aedf7cf4da9276d80610f04441b2a4f6506cb2daaf%40%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/r79a7c019712b39aedf7cf4da9276d80610f04441b2a4f6506cb2daaf%40%3Cusers.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/rd84fae1f474597bdf358f5bdc0a5c453c507bd527b83e8be6b5ea3f4%40%3Cannounce.tomcat.apache.org%3E
- https://security.gentoo.org/glsa/202208-34
- https://security.netapp.com/advisory/ntap-20210827-0007/
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://kc.mcafee.com/corporate/index?page=content&id=SB10366
- https://lists.apache.org/thread.html/r79a7c019712b39aedf7cf4da9276d80610f04441b2a4f6506cb2daaf%40%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/r79a7c019712b39aedf7cf4da9276d80610f04441b2a4f6506cb2daaf%40%3Cusers.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/rd84fae1f474597bdf358f5bdc0a5c453c507bd527b83e8be6b5ea3f4%40%3Cannounce.tomcat.apache.org%3E
- https://security.gentoo.org/glsa/202208-34
- https://security.netapp.com/advisory/ntap-20210827-0007/
- https://www.oracle.com/security-alerts/cpujan2022.html
Products affected by CVE-2021-30639
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cpe:2.3:a:apache:tomcat:10.0.3
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cpe:2.3:a:apache:tomcat:10.0.4
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cpe:2.3:a:apache:tomcat:8.5.64
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cpe:2.3:a:apache:tomcat:9.0.44
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cpe:2.3:a:mcafee:epolicy_orchestrator:-
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cpe:2.3:a:mcafee:epolicy_orchestrator:2.0
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cpe:2.3:a:mcafee:epolicy_orchestrator:2.5
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cpe:2.3:a:mcafee:epolicy_orchestrator:2.5.1
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cpe:2.3:a:mcafee:epolicy_orchestrator:3.0
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cpe:2.3:a:mcafee:epolicy_orchestrator:3.5.0
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cpe:2.3:a:mcafee:epolicy_orchestrator:3.6.0
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cpe:2.3:a:mcafee:epolicy_orchestrator:3.6.1
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cpe:2.3:a:mcafee:epolicy_orchestrator:4.0
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cpe:2.3:a:mcafee:epolicy_orchestrator:4.5.0
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cpe:2.3:a:mcafee:epolicy_orchestrator:4.5.3
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cpe:2.3:a:mcafee:epolicy_orchestrator:4.5.4
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cpe:2.3:a:mcafee:epolicy_orchestrator:4.5.5
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cpe:2.3:a:mcafee:epolicy_orchestrator:4.5.6
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cpe:2.3:a:mcafee:epolicy_orchestrator:4.5.7
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cpe:2.3:a:mcafee:epolicy_orchestrator:4.6.0
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cpe:2.3:a:mcafee:epolicy_orchestrator:4.6.1
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cpe:2.3:a:mcafee:epolicy_orchestrator:4.6.2
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cpe:2.3:a:mcafee:epolicy_orchestrator:4.6.3
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cpe:2.3:a:mcafee:epolicy_orchestrator:4.6.4
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cpe:2.3:a:mcafee:epolicy_orchestrator:4.6.5
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cpe:2.3:a:mcafee:epolicy_orchestrator:4.6.6
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cpe:2.3:a:mcafee:epolicy_orchestrator:4.6.7
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cpe:2.3:a:mcafee:epolicy_orchestrator:4.6.8
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cpe:2.3:a:mcafee:epolicy_orchestrator:4.6.9
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cpe:2.3:a:mcafee:epolicy_orchestrator:5.0.0
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cpe:2.3:a:mcafee:epolicy_orchestrator:5.0.1
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cpe:2.3:a:mcafee:epolicy_orchestrator:5.1.0
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cpe:2.3:a:mcafee:epolicy_orchestrator:5.1.1
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cpe:2.3:a:mcafee:epolicy_orchestrator:5.1.2
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cpe:2.3:a:mcafee:epolicy_orchestrator:5.1.3
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cpe:2.3:a:mcafee:epolicy_orchestrator:5.10.0
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cpe:2.3:a:mcafee:epolicy_orchestrator:5.3.0
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cpe:2.3:a:mcafee:epolicy_orchestrator:5.3.1
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cpe:2.3:a:mcafee:epolicy_orchestrator:5.3.2
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cpe:2.3:a:mcafee:epolicy_orchestrator:5.3.3
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cpe:2.3:a:mcafee:epolicy_orchestrator:5.9.0
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cpe:2.3:a:mcafee:epolicy_orchestrator:5.9.1
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cpe:2.3:a:oracle:big_data_spatial_and_graph:-
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cpe:2.3:a:oracle:big_data_spatial_and_graph:2.0