CVEvulnerability
CVE-2020-13943
4.3 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2020-10-12
- Last modified
- 2026-10-08
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 4.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- CVSS 2.0 ([email protected])
- 4.0 MEDIUM — AV:N/AC:L/Au:S/C:P/I:N/A:N
Description
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 configurations
• apache tomcat 8.5.0
• apache tomcat 8.5.1
• apache tomcat 8.5.2
• apache tomcat 8.5.3
• apache tomcat 8.5.4
• apache tomcat 8.5.5
• apache tomcat 8.5.6
• apache tomcat 8.5.7
• apache tomcat 8.5.8
• apache tomcat 8.5.9
• apache tomcat 8.5.10
• apache tomcat 8.5.11
• apache tomcat 8.5.12
• apache tomcat 8.5.13
• apache tomcat 8.5.14
• apache tomcat 8.5.15
• apache tomcat 8.5.16
• apache tomcat 8.5.17
• apache tomcat 8.5.18
• apache tomcat 8.5.19
• apache tomcat 8.5.20
• apache tomcat 8.5.21
• apache tomcat 8.5.22
• apache tomcat 8.5.23
• apache tomcat 8.5.24
• apache tomcat 8.5.25
• apache tomcat 8.5.26
• apache tomcat 8.5.27
• apache tomcat 8.5.28
• apache tomcat 8.5.29
• apache tomcat 8.5.30
• apache tomcat 8.5.31
• apache tomcat 8.5.32
• apache tomcat 8.5.33
• apache tomcat 8.5.34
• apache tomcat 8.5.35
• apache tomcat 8.5.36
• apache tomcat 8.5.37
• apache tomcat 8.5.38
• apache tomcat 8.5.39
• apache tomcat 8.5.40
• apache tomcat 8.5.41
• apache tomcat 8.5.42
• apache tomcat 8.5.43
• apache tomcat 8.5.44
• apache tomcat 8.5.45
• apache tomcat 8.5.46
• apache tomcat 8.5.47
• apache tomcat 8.5.48
• apache tomcat 8.5.49
• apache tomcat 8.5.50
• apache tomcat 8.5.51
• apache tomcat 8.5.52
• apache tomcat 8.5.53
• apache tomcat 8.5.54
• apache tomcat 8.5.55
• apache tomcat 8.5.56
• apache tomcat 8.5.57
• apache tomcat 9.0.0
• apache tomcat 9.0.1
… and 43 more
References
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00002.html Mailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00021.html Broken Link
- https://lists.apache.org/thread.html/r4a390027eb27e4550142fac6c8317cc684b157ae314d31514747f307%40%3Cannounce.tomcat.apache.org%3E Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2020/10/msg00019.html Third Party Advisory
- https://security.netapp.com/advisory/ntap-20201016-0007/ Third Party Advisory
- https://www.debian.org/security/2021/dsa-4835 Third Party Advisory
- https://www.oracle.com/security-alerts/cpuApr2021.html Patch, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00002.html Mailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00021.html Broken Link
- https://lists.apache.org/thread.html/r4a390027eb27e4550142fac6c8317cc684b157ae314d31514747f307%40%3Cannounce.tomcat.apache.org%3E Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2020/10/msg00019.html Third Party Advisory
- https://security.netapp.com/advisory/ntap-20201016-0007/ Third Party Advisory
- https://www.debian.org/security/2021/dsa-4835 Third Party Advisory
- https://www.oracle.com/security-alerts/cpuApr2021.html Patch, Third Party Advisory