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Advisory details: gitlab / maven/org.apache.tomcat/tomcat-coyote/CVE-2020-13943
Advisory ID gitlab/maven/org.apache.tomcat/tomcat-coyote/CVE-2020-13943
Aliases CVE-2020-13943
Summary HTTP Request Smuggling If a `HTTP/2` client connecting to Apache Tomcat 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 from a previous request rather than the intended headers. This could lead to users seeing responses for unexpected resources.
Status Published
Exploitability 0.5
Weighted Severity 0.0
Risk
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (2)
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv2 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/org.apache.tomcat/tomcat-coyote/CVE-2020-13943.yml
cvssv3.1 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/org.apache.tomcat/tomcat-coyote/CVE-2020-13943.yml
Reference id Reference type URL
CVE-2020-13943 https://nvd.nist.gov/vuln/detail/CVE-2020-13943
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: AV:N/AC:L/Au:S/C:P/I:N/A:N Found at https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/org.apache.tomcat/tomcat-coyote/CVE-2020-13943.yml
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Found at https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/org.apache.tomcat/tomcat-coyote/CVE-2020-13943.yml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none

There are no SSVC decisions available.