CVE-2021-30640

MediumCVSS 6.5/10Last modified Oct 8, 2026

Description

A vulnerability in the JNDI Realm of Apache Tomcat allows an attacker to authenticate using variations of a valid user name and/or to bypass some of the protection provided by the LockOut Realm. This issue affects Apache Tomcat 10.0.0-M1 to 10.0.5; 9.0.0.M1 to 9.0.45; 8.5.0 to 8.5.65.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N

Weakness enumeration

CWE-116

Affected software

Vendor	Product	Versions
Apache Software Foundation	Apache Tomcat	Apache Tomcat 10 10.0.0-M1 to 10.0.5; Apache Tomcat 9 9.0.0.M1 to 9.0.45; Apache Tomcat 8.5 8.5.0 to 8.5.65; Apache Tomcat 7 7.0.0 to 7.0.108

References

https://lists.apache.org/thread.html/r59f9ef03929d32120f91f4ea7e6e79edd5688d75d0a9b65fd26d1fe8%40%3Cannounce.tomcat.apache.org%3EMailing List, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2021/08/msg00009.htmlMailing List, Third Party Advisory
https://security.gentoo.org/glsa/202208-34Third Party Advisory
https://security.netapp.com/advisory/ntap-20210827-0007/Third Party Advisory
https://www.debian.org/security/2021/dsa-4952Third Party Advisory
https://www.debian.org/security/2021/dsa-4986Third Party Advisory
https://www.oracle.com//security-alerts/cpujul2021.htmlThird Party Advisory
https://www.oracle.com/security-alerts/cpujan2022.htmlPatch, Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
https://lists.apache.org/thread.html/r59f9ef03929d32120f91f4ea7e6e79edd5688d75d0a9b65fd26d1fe8%40%3Cannounce.tomcat.apache.org%3EMailing List, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2021/08/msg00009.htmlMailing List, Third Party Advisory
https://security.gentoo.org/glsa/202208-34Third Party Advisory
https://security.netapp.com/advisory/ntap-20210827-0007/Third Party Advisory
https://www.debian.org/security/2021/dsa-4952Third Party Advisory
https://www.debian.org/security/2021/dsa-4986Third Party Advisory
https://www.oracle.com//security-alerts/cpujul2021.htmlThird Party Advisory
https://www.oracle.com/security-alerts/cpujan2022.htmlPatch, Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory

Timeline

Published: Jul 12, 2021
Last modified: Oct 8, 2026
NVD status: Modified

Related CVEs from 2021

CVE-2021-306415.3Apache HTTP Server versions 2.4.39 to 2.4.46 Unexpected matching behavior with 'MergeSlashes OFF'CVE-2021-306429.8An input validation flaw in the Symantec Security Analytics web UI 7.2 prior 7.2.7, 8.1, prior to 8.1.3-NSR3, 8.2, prior to 8.2.1-NSR2 or 8.CVE-2021-306489.8The Symantec Advanced Secure Gateway (ASG) and ProxySG web management consoles are susceptible to an authentication bypass vulnerability. An CVE-2021-306506.1A reflected cross-site scripting (XSS) vulnerability in the Symantec Layer7 API Management OAuth Toolkit (OTK) allows a remote attacker to c CVE-2021-306514.9A malicious authenticated SMG administrator user can obtain passwords for external LDAP/Active Directory servers that they might not otherwi CVE-2021-306527.0A race condition was addressed with additional validation. This issue is fixed in Security Update 2021-002 Catalina, Security Update 2021-00 CVE-2021-306537.8This issue was addressed with improved checks. This issue is fixed in macOS Big Sur 11.3, iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5. CVE-2021-306545.5This issue was addressed by removing additional entitlements. This issue is fixed in GarageBand 10.4.3. A local attacker may be able to read CVE-2021-306559.8An application may be able to execute arbitrary code with system privileges. This issue is fixed in macOS Big Sur 11.3, Security Update 2021 CVE-2021-306565.5An access issue was addressed with improved memory management. This issue is fixed in iOS 14.5 and iPadOS 14.5. A malicious application may CVE-2021-306575.5A logic issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.3, Security Update 2021-002 Catalina. A CVE-2021-306585.5This issue was addressed with improved handling of file metadata. This issue is fixed in macOS Big Sur 11.3. A malicious application may byp