Vulnerability in Apache Tomcat
CVE-2021-30640
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N.
EPSS exploit prediction
EPSS: 0.099 (95.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 96th percentile — 95.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.099 · newest: 0.099 · change: 0.000
Affected products
- Apache Tomcat
- Apache Software Foundation Tomcat — versions 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
- Oracle Communications Cloud Native Core Policy — versions 1.14.0
- Oracle Communications Diameter Signaling Router
- Oracle Communications Pricing Design Center — versions 12.0.0.3.0
- Oracle Hospitality Cruise Shipboard Property Management System — versions 20.1.0
- Oracle Tekelec Platform Distribution
- Debian Linux — versions 9.0, 10.0, 11.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- lists.apache.org/thread.html/r59f9ef03929d32120f91f4ea7e6e79edd5688d75d0a9b65fd… (Mailing List, Vendor Advisory)
- www.oracle.com//security-alerts/cpujul2021.html (Third Party Advisory)
- lists.debian.org/debian-lts-announce/2021/08/msg00009.html (mailing-list, Mailing List, Third Party Advisory)
- www.debian.org/security/2021/dsa-4952 (vendor-advisory, Third Party Advisory)
- www.debian.org/security/2021/dsa-4986 (vendor-advisory, Third Party Advisory)
- www.oracle.com/security-alerts/cpuoct2021.html (Patch, Third Party Advisory)
- security.netapp.com/advisory/ntap-20210827-0007/ (Third Party Advisory)
- www.oracle.com/security-alerts/cpujan2022.html (Patch, Third Party Advisory)
- security.gentoo.org/glsa/202208-34 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-30640?
- CVE-2021-30640 is a medium-severity vulnerability in Apache Tomcat, classified under Improper Encoding or Escaping of Output. CVSS score: 6.5/10. Published 2021-07-12.
- How severe is CVE-2021-30640?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2021-30640 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.