Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
Low
Attack Vector
Network
0

CVE-2020-13943

Disclosure Date: October 12, 2020 •
CVE-2020-13943 CVSS v3 Base Score: 4.3
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

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.

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CVSS V3 Severity and Metrics
Base Score:
4.3 Medium
Impact Score:
1.4
Exploitability Score:
2.8
Vector:
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
Low
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
Low
Integrity (I):
None
Availability (A):
None

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
Apache Tomcat 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
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown

Vendors

  • apache,
  • debian,
  • oracle

Products

  • debian linux 10.0,
  • debian linux 9.0,
  • instantis enterprisetrack 17.1,
  • instantis enterprisetrack 17.2,
  • instantis enterprisetrack 17.3,
  • sd-wan edge 9.0,
  • tomcat 10.0.0,
  • tomcat 8.5.0,
  • tomcat 8.5.1,
  • tomcat 8.5.10,
  • tomcat 8.5.11,
  • tomcat 8.5.12,
  • tomcat 8.5.13,
  • tomcat 8.5.14,
  • tomcat 8.5.15,
  • tomcat 8.5.16,
  • tomcat 8.5.17,
  • tomcat 8.5.18,
  • tomcat 8.5.19,
  • tomcat 8.5.2,
  • tomcat 8.5.20,
  • tomcat 8.5.21,
  • tomcat 8.5.22,
  • tomcat 8.5.23,
  • tomcat 8.5.24,
  • tomcat 8.5.25,
  • tomcat 8.5.26,
  • tomcat 8.5.27,
  • tomcat 8.5.28,
  • tomcat 8.5.29,
  • tomcat 8.5.3,
  • tomcat 8.5.30,
  • tomcat 8.5.31,
  • tomcat 8.5.32,
  • tomcat 8.5.33,
  • tomcat 8.5.34,
  • tomcat 8.5.35,
  • tomcat 8.5.36,
  • tomcat 8.5.37,
  • tomcat 8.5.38,
  • tomcat 8.5.39,
  • tomcat 8.5.4,
  • tomcat 8.5.40,
  • tomcat 8.5.41,
  • tomcat 8.5.42,
  • tomcat 8.5.43,
  • tomcat 8.5.44,
  • tomcat 8.5.45,
  • tomcat 8.5.46,
  • tomcat 8.5.47,
  • tomcat 8.5.48,
  • tomcat 8.5.49,
  • tomcat 8.5.5,
  • tomcat 8.5.50,
  • tomcat 8.5.51,
  • tomcat 8.5.52,
  • tomcat 8.5.53,
  • tomcat 8.5.54,
  • tomcat 8.5.55,
  • tomcat 8.5.56,
  • tomcat 8.5.57,
  • tomcat 8.5.6,
  • tomcat 8.5.7,
  • tomcat 8.5.8,
  • tomcat 8.5.9,
  • tomcat 9.0.0,
  • tomcat 9.0.1,
  • tomcat 9.0.10,
  • tomcat 9.0.11,
  • tomcat 9.0.12,
  • tomcat 9.0.13,
  • tomcat 9.0.14,
  • tomcat 9.0.15,
  • tomcat 9.0.16,
  • tomcat 9.0.17,
  • tomcat 9.0.18,
  • tomcat 9.0.19,
  • tomcat 9.0.2,
  • tomcat 9.0.20,
  • tomcat 9.0.21,
  • tomcat 9.0.22,
  • tomcat 9.0.23,
  • tomcat 9.0.24,
  • tomcat 9.0.25,
  • tomcat 9.0.26,
  • tomcat 9.0.27,
  • tomcat 9.0.28,
  • tomcat 9.0.29,
  • tomcat 9.0.3,
  • tomcat 9.0.30,
  • tomcat 9.0.31,
  • tomcat 9.0.32,
  • tomcat 9.0.33,
  • tomcat 9.0.34,
  • tomcat 9.0.35,
  • tomcat 9.0.36,
  • tomcat 9.0.37,
  • tomcat 9.0.4,
  • tomcat 9.0.5,
  • tomcat 9.0.6,
  • tomcat 9.0.7,
  • tomcat 9.0.8,
  • tomcat 9.0.9
Technical Analysis