CVE - CVE-2021-30639

CVE-ID
CVE-2021-30639	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CONFIRM:https://kc.mcafee.com/corporate/index?page=content&id=SB10366 URL:https://kc.mcafee.com/corporate/index?page=content&id=SB10366 CONFIRM:https://security.netapp.com/advisory/ntap-20210827-0007/ URL:https://security.netapp.com/advisory/ntap-20210827-0007/ GENTOO:GLSA-202208-34 URL:https://security.gentoo.org/glsa/202208-34 MISC:https://lists.apache.org/thread.html/rd84fae1f474597bdf358f5bdc0a5c453c507bd527b83e8be6b5ea3f4%40%3Cannounce.tomcat.apache.org%3E URL:https://lists.apache.org/thread.html/rd84fae1f474597bdf358f5bdc0a5c453c507bd527b83e8be6b5ea3f4%40%3Cannounce.tomcat.apache.org%3E MISC:https://www.oracle.com/security-alerts/cpujan2022.html URL:https://www.oracle.com/security-alerts/cpujan2022.html MLIST:[tomcat-dev] 20210712 RE: [SECURITY] CVE-2021-30639 Apache Tomcat DoS URL:https://lists.apache.org/thread.html/r79a7c019712b39aedf7cf4da9276d80610f04441b2a4f6506cb2daaf@%3Cdev.tomcat.apache.org%3E MLIST:[tomcat-users] 20210712 RE: [SECURITY] CVE-2021-30639 Apache Tomcat DoS URL:https://lists.apache.org/thread.html/r79a7c019712b39aedf7cf4da9276d80610f04441b2a4f6506cb2daaf@%3Cusers.tomcat.apache.org%3E
Assigning CNA
Apache Software Foundation
Date Record Created
20210413	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20210413)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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