Vulnerability in Apache Tomcat
CVE-2020-13943
If an HTTP/2 client connecting to Apache Tomcat 10.0.0-M1 to 10.0.0-M7, 9.0.0.M1 to 9.0.37 or 8.5.0 to 8.5.57 exceeded the agreed maximum number of concurrent streams for a connection (in violation of the HTTP/2 protocol), it was possible…
EPSS: 0.573 (99.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
Affected products
- Apache Tomcat — versions 8.5.0, 8.5.1, 8.5.2
- Oracle Instantis_enterprisetrack — versions 17.1, 17.2, 17.3
- Oracle Sd-wan_edge — versions 9.0
- Debian Debian_linux — versions 9.0, 10.0
- N/a Apache Tomcat — versions Apache Tomcat 10.0.0-M1 to 10.0.0-M7, 9.0.0.M1 to 9.0.37, 8.5.0 to 8.5.57
Public proof-of-concept exploits
References
- security@apache.org (x_refsource_MISC, Vendor Advisory)
- security@apache.org (mailing-list, x_refsource_MLIST, Third Party Advisory)
- security@apache.org (vendor-advisory, Mailing List, Third Party Advisory, x_refsource_SUSE)
- security@apache.org (vendor-advisory, Broken Link, x_refsource_SUSE)
- security@apache.org (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
- security@apache.org (Patch, Third Party Advisory, x_refsource_MISC)
- security@apache.org (x_refsource_CONFIRM, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-13943?
- CVE-2020-13943 is a medium-severity vulnerability in Apache Tomcat. CVSS score: 4.3/10. Published 2020-10-12.
- How severe is CVE-2020-13943?
- Medium severity. CVSS v3 base score is 4.3 out of 10.
- Is CVE-2020-13943 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.