Improper Authentication The advisory has been revoked - it doesn't affect any version of package tomcat7 (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU1804-TOMCAT7-1319113
- published22 Aug 2025
- disclosed12 Jul 2021
Introduced: 12 Jul 2021
CVE-2021-30640 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:18.04.
NVD Description
Note: Versions mentioned in the description apply only to the upstream tomcat7 package and not the tomcat7 package as distributed by Ubuntu.
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.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2021-30640
- https://security.netapp.com/advisory/ntap-20210827-0007/
- https://www.debian.org/security/2021/dsa-4952
- https://www.debian.org/security/2021/dsa-4986
- https://lists.apache.org/thread.html/r59f9ef03929d32120f91f4ea7e6e79edd5688d75d0a9b65fd26d1fe8%40%3Cannounce.tomcat.apache.org%3E
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://lists.debian.org/debian-lts-announce/2021/08/msg00009.html
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://security.gentoo.org/glsa/202208-34
- https://www.oracle.com/security-alerts/cpujan2022.html