CVE-2021-32813
Traefik Connection Header Privilege Escalation Vulnerability
Description
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.
INFO
Published Date :
Aug. 3, 2021, 11:15 p.m.
Last Modified :
Nov. 21, 2024, 6:07 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
2.2
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-32813.
| URL | Resource |
|---|---|
| https://github.com/traefik/traefik/pull/8319/commits/cbaf86a93014a969b8accf39301932c17d0d73f9 | Patch Third Party Advisory |
| https://github.com/traefik/traefik/releases/tag/v2.4.13 | Third Party Advisory |
| https://github.com/traefik/traefik/security/advisories/GHSA-m697-4v8f-55qg | Third Party Advisory |
| https://github.com/traefik/traefik/pull/8319/commits/cbaf86a93014a969b8accf39301932c17d0d73f9 | Patch Third Party Advisory |
| https://github.com/traefik/traefik/releases/tag/v2.4.13 | Third Party Advisory |
| https://github.com/traefik/traefik/security/advisories/GHSA-m697-4v8f-55qg | Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-32813 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-32813 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://github.com/traefik/traefik/pull/8319/commits/cbaf86a93014a969b8accf39301932c17d0d73f9 Added Reference https://github.com/traefik/traefik/releases/tag/v2.4.13 Added Reference https://github.com/traefik/traefik/security/advisories/GHSA-m697-4v8f-55qg -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Aug. 11, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://github.com/traefik/traefik/pull/8319/commits/cbaf86a93014a969b8accf39301932c17d0d73f9 No Types Assigned https://github.com/traefik/traefik/pull/8319/commits/cbaf86a93014a969b8accf39301932c17d0d73f9 Patch, Third Party Advisory Changed Reference Type https://github.com/traefik/traefik/releases/tag/v2.4.13 No Types Assigned https://github.com/traefik/traefik/releases/tag/v2.4.13 Third Party Advisory Changed Reference Type https://github.com/traefik/traefik/security/advisories/GHSA-m697-4v8f-55qg No Types Assigned https://github.com/traefik/traefik/security/advisories/GHSA-m697-4v8f-55qg Third Party Advisory Added CWE NIST CWE-913 Added CPE Configuration OR *cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:* versions up to (excluding) 2.4.13
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-32813 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-32813
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.34 }} 0.09%
score
0.70912
percentile