Strix
26.1K

CVE-2021-43206

MEDIUMCVSS 4.3/10EPSS 0.72%

Last modified

CVE-2021-43206 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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.. EPSS estimates a 0.72% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
4.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

EPSS Probability
0.72%

49.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
FortinetFortiproxy>= 2.0.0, < 2.0.9
FortinetFortiproxy>= 7.0.0, < 7.0.2
FortinetFortios>= 5.6.0, < 6.0.14
FortinetFortios>= 6.2.0, < 6.2.10
FortinetFortios>= 6.4.0, < 6.4.8
FortinetFortios>= 7.0.0, < 7.0.4

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-43206?
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.
How severe is CVE-2021-43206?
CVE-2021-43206 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.72% probability of exploitation in the next 30 days.
How do I fix CVE-2021-43206?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-43206?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST