CVE-2021-43206
First published: Wed May 04 2022(Updated: )
A server-generated error message containing sensitive information in Fortinet FortiOS 7.0.0 through 7.0.3, 6.4.0 through 6.4.8, 6.2.x, 6.0.x and FortiProxy 7.0.0 through 7.0.1, 2.0.x allows malicious webservers to retrieve a web proxy's client username and IP via same origin HTTP requests triggering proxy-generated HTTP status codes pages.
Credit: psirt@fortinet.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Fortinet FortiProxy | >=2.0.0<2.0.9 | |
| Fortinet FortiProxy | >=7.0.0<7.0.2 | |
| Fortinet FortiOS | >=5.6.0<6.0.14 | |
| Fortinet FortiOS | >=6.2.0<6.2.10 | |
| Fortinet FortiOS | >=6.4.0<6.4.8 | |
| Fortinet FortiOS | >=7.0.0<7.0.4 |
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Reference Links
Frequently Asked Questions
What is CVE-2021-43206?
CVE-2021-43206 is a vulnerability in Fortinet FortiOS and FortiProxy that allows malicious webservers to retrieve a web proxy's client username and IP.
Which software versions are affected by CVE-2021-43206?
Fortinet FortiOS versions 7.0.0 through 7.0.3, 6.4.0 through 6.4.8, 6.2.x, 6.0.x, and FortiProxy versions 7.0.0 through 7.0.1, 2.0.x are affected by CVE-2021-43206.
What is the severity of CVE-2021-43206?
CVE-2021-43206 has a severity score of 4.3 (medium).
How can a malicious webserver exploit CVE-2021-43206?
A malicious webserver can exploit CVE-2021-43206 by triggering a server-generated error message that contains sensitive information, allowing it to retrieve a web proxy's client username and IP.
Is there a fix available for CVE-2021-43206?
Yes, Fortinet has released patches to address the vulnerability. It is recommended to update to the latest version of Fortinet FortiOS or FortiProxy to mitigate the risk.
- agent/type
- agent/softwarecombine
- agent/last-modified-date
- agent/first-publish-date
- collector/nvd-index
- agent/software-canonical-lookup-request
- agent/references
- agent/author
- agent/severity
- agent/weakness
- agent/tags
- agent/description
- agent/event
- collector/mitre-cve
- source/MITRE
- vendor/fortinet
- canonical/fortinet fortiproxy
- version/fortinet fortiproxy/2.0.0
- version/fortinet fortiproxy/7.0.0
- canonical/fortinet fortios
- version/fortinet fortios/5.6.0
- version/fortinet fortios/6.2.0
- version/fortinet fortios/6.4.0
- version/fortinet fortios/7.0.0