High severity · published Jan 11, 2022
CVE-2021-43999
Apache Guacamole 1.2.0 and 1.3.0 do not properly validate responses received from a SAML identity provider
8.8
CVSS
1.8%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.8% · higher than 78% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GU
Guacamole · Apache
1.2.0; 1.3.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-43999
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-43999
Mailing List
http://www.openwall.com/lists/oss-security/2022/01/11/7
Mailing List
https://lists.apache.org/thread/4dt9h5mo4o9rxlgxm3rp8wfqdtdjn2z9
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