CVE-2021-43999

Improper validation of SAML responses

Description

Apache Guacamole 1.2.0 and 1.3.0 do not properly validate responses received from a SAML identity provider. If SAML support is enabled, this may allow a malicious user to assume the identity of another Guacamole user.

Category

8.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.75% Top 20%
Vendor Advisory apache.org
Affected: Apache Software Foundation Apache Guacamole
Published at:
Updated at:

References

Link Tags
https://lists.apache.org/thread/4dt9h5mo4o9rxlgxm3rp8wfqdtdjn2z9 vendor advisory mailing list
http://www.openwall.com/lists/oss-security/2022/01/11/7 third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2021-43999?
CVE-2021-43999 has been scored as a high severity vulnerability.
How to fix CVE-2021-43999?
To fix CVE-2021-43999, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-43999 being actively exploited in the wild?
It is possible that CVE-2021-43999 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-43999?
CVE-2021-43999 affects Apache Software Foundation Apache Guacamole.
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