CVE-2020-13943
Published: 12 October 2020
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.
Priority
Status
Package | Release | Status |
---|---|---|
tomcat8 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(code not present)
|
focal |
Does not exist
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
xenial |
Not vulnerable
(code not present)
|
|
tomcat9 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(code not present)
|
focal |
Not vulnerable
(code not present)
|
|
precise |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Released
(9.0.38-1)
|
|
xenial |
Does not exist
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 4.3 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | Low |
User interaction | None |
Scope | Unchanged |
Confidentiality | Low |
Integrity impact | None |
Availability impact | None |
Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-13943
- https://github.com/apache/tomcat/commit/55911430df13f8c9998fbdee1f9716994d2db59b (9.0.38)
- https://github.com/apache/tomcat/commit/9d7def063b47407a09a2f9202beed99f4dcb292a (8.5.58)
- https://lists.apache.org/thread.html/r4a390027eb27e4550142fac6c8317cc684b157ae314d31514747f307%40%3Cannounce.tomcat.apache.org%3E
- NVD
- Launchpad
- Debian