medium4.3
CVE-2020-13943
Exposure of Sensitive Information to an Unauthorized Actor in Apache Tomcat
Impact
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 that a subsequent request made on that connection could contain HTTP headers - including HTTP/2 pseudo headers - from a previous request rather than the intended headers. This could lead to users seeing responses for unexpected resources.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| maven | org.apache.tomcat:tomcat-coyote | >= 10.0.0-M1, <= 10.0.0-M7 | 10.0.0-M8 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Apache | Tomcat | Versions 8.5.0, 8.5.1, 8.5.2, 8.5.3, 8.5.4, 8.5.5 |
| Debian | Debian Linux | Versions 9.0, 10.0 |
| Oracle | Instantis Enterprisetrack | Versions 17.1, 17.2, 17.3 |
| Oracle | Sd-Wan Edge | Version 9.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00002.html
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00021.html
- https://lists.apache.org/thread.html/r4a390027eb27e4550142fac6c8317cc684b157ae314d31514747f307%40%3Cannounce.tomcat.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2020/10/msg00019.html
- https://security.netapp.com/advisory/ntap-20201016-0007/
- https://www.debian.org/security/2021/dsa-4835
- https://www.oracle.com/security-alerts/cpuApr2021.html
- https://github.com/advisories/GHSA-f268-65qc-98vg
- https://nvd.nist.gov/vuln/detail/CVE-2020-13943
- https://github.com/apache/tomcat/commit/1bbc650cbc3f08d85a1ec6d803c47ae53a84f3bb
- https://github.com/apache/tomcat/commit/55911430df13f8c9998fbdee1f9716994d2db59b
- https://github.com/apache/tomcat/commit/9d7def063b47407a09a2f9202beed99f4dcb292a