CVE-2020-8300 SAML authentication hijack through phishing ATTACK
To all customer with SAML authentication!
AXACOM encourage all customer with SAML authentication to have a close look at CVE-2020-8300 and implement the described measures to fix the issue, as soon as possible.
Description of Problem
Multiple vulnerabilities have been discovered in Citrix ADC (formerly known as NetScaler ADC), Citrix Gateway (formerly known as NetScaler Gateway) and Citrix SD-WAN WANOP appliance models 4000-WO, 4100-WO, 5000-WO, and 5100-WO. These vulnerabilities, if exploited, could result in the following security issues:
| CVE-ID | Description | CWE | Affected Products | Pre-conditions |
| CVE-2020-8300 | SAML authentication hijack through a phishing attack to steal a valid user session | CWE-284: Improper access control | Citrix ADC, Citrix Gateway | Citrix ADC or Citrix Gateway must be configured as a SAML SP or a SAML IdP |
The following supported versions of Citrix ADC and Citrix Gateway are affected by CVE-2020-8300:
- Citrix ADC and Citrix Gateway 13.0. before 13.0-82.41
- Citrix ADC and Citrix Gateway 12.1 before 12.1-62.23
- Citrix ADC and NetScaler Gateway 11.1 before 11.1-65.20
- Citrix ADC 12.1-FIPS before 12.1-55.238
What Customers Should Do
The following supported versions of Citrix ADC and Citrix Gateway address CVE-2020-8300, a High severity vulnerability.
- Citrix ADC and Citrix Gateway 13.0-82.41 and later releases of 13.0
- Citrix ADC and NetScaler Gateway ADC 12.1-62.23 and later releases of 12.1
- Citrix ADC and NetScaler Gateway 11.1-65.20 and later releases of 11.1
- Citrix ADC 12.1-FIPS 12.1-55.238 and later releases of 12.1-FIPS
- Citrix ADC and Citrix Gateway 13.0-82.41 and later releases of 13.0
- Citrix ADC and NetScaler Gateway ADC 12.1-62.23 and later releases of 12.1
- Citrix ADC and NetScaler Gateway 11.1-65.20 and later releases of 11.1
- Citrix ADC 12.1-FIPS 12.1-55.238 and later releases of 12.1-FIPS
- Citrix ADC and Citrix Gateway 13.0-82.41 and later releases of 13.0
- Citrix ADC and NetScaler Gateway ADC 12.1-62.23 and later releases of 12.1
- Citrix ADC and NetScaler Gateway 11.1-65.20 and later releases of 11.1
- Citrix ADC 12.1-FIPS 12.1-55.238 and later releases of 12.1-FIPS
NOTE: In addition, upon upgrading to the fixed version, customers must modify the device configuration to resolve CVE-2020-8300. See Citrix Application Delivery Controller and Citrix Gateway – SAML Configuration Reference Guide for details.
ACHTUNG:
Das Update von Firmware Versionen kleiner, oder gleich 12.1.59.x, bzw. 13.0.64.35 führt dazu, dass der SSO für viele Anwendungen nicht mehr funktioniert. Vor dem Update sollte daher unbedingt folgender Citrix eDocs Artikel gelesen werden: Enable SSO for Basic, Digest, and NTLM authentication (citrix.com)