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Vulnerability Details : CVE-2021-32813

Traefik is an HTTP reverse proxy and load balancer. Prior to version 2.4.13, there exists a potential header vulnerability in Traefik's handling of the Connection header. Active exploitation of this issue is unlikely, as it requires that a removed header would lead to a privilege escalation, however, the Traefik team has addressed this issue to prevent any potential abuse. If one has a chain of Traefik middlewares, and one of them sets a request header, then sending a request with a certain Connection header will cause it to be removed before the request is sent. In this case, the backend does not see the request header. A patch is available in version 2.4.13. There are no known workarounds aside from upgrading.
Publish Date : 2021-08-03 Last Update Date : 2021-08-11
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- CVSS Scores & Vulnerability Types

CVSS Score
6.8
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s)
CWE ID 913

- Products Affected By CVE-2021-32813

# Product Type Vendor Product Version Update Edition Language
1 Application Traefik Traefik * * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Traefik Traefik 1

- References For CVE-2021-32813

https://github.com/traefik/traefik/pull/8319/commits/cbaf86a93014a969b8accf39301932c17d0d73f9
https://github.com/traefik/traefik/security/advisories/GHSA-m697-4v8f-55qg CONFIRM
https://github.com/traefik/traefik/releases/tag/v2.4.13

- Metasploit Modules Related To CVE-2021-32813

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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