CVE-2020-8193: Citrix ADC, Gateway, and SD-WAN WANOP Appliance Authorization Bypass Vulnerability

Published Jul 10, 2020
·
Updated

Improper access control in Citrix ADC and Citrix Gateway versions before 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 and Citrix SDWAN WAN-OP versions before 11.1.1a, 11.0.3d and 10.2.7 allows unauthenticated access to certain URL endpoints.

Other sources

Citrix ADC, Citrix Gateway, and multiple Citrix SD-WAN WANOP appliance models contain an authorization bypass vulnerability that may allow unauthenticated access to certain URL endpoints. The attacker must have access to the NetScaler IP (NSIP) in order to perform exploitation.

— CISA

Affected Software

28 affected components
Citrix Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance
Citrix Application Delivery Controller Firmware>=10.5<10.5-70.18
Citrix Application Delivery Controller Firmware>=11.1<11.1-64.14
Citrix Application Delivery Controller Firmware>=12.0<12.0-63.21
Citrix Application Delivery Controller Firmware>=12.1<12.1-57.18
Citrix Application Delivery Controller Firmware>=13.0<13.0-58.30
Citrix Application Delivery Controller
Citrix Netscaler Gateway Firmware>=10.5<10.5-70.18
Citrix Netscaler Gateway Firmware>=11.1<11.1-64.14
Citrix Netscaler Gateway Firmware>=12.0<12.0-63.21
Citrix Netscaler Gateway Firmware>=12.1<12.1-57.18
Citrix NetScaler Gateway
Citrix Gateway Firmware>=13.0<13.0-58.30
Citrix Gateway
Citrix SD-WAN WANOP>=10.2<10.2.7
Citrix SD-WAN WANOP>=11.0<11.0.3d
Citrix SD-WAN WANOP>=11.1<11.1.1a
Citrix 4000-WO
Citrix 4100-WO
Citrix 5000-WO
Citrix 5100-WO
All of the following
Any of the following
Citrix SD-WAN WANOP>=10.2<10.2.7
Citrix SD-WAN WANOP>=11.0<11.0.3d
Citrix SD-WAN WANOP>=11.1<11.1.1a
Any of the following
Citrix 4000-WO
Citrix 4100-WO
Citrix 5000-WO
Citrix 5100-WO

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade Citrix ADC to a version that resolves this vulnerability.

    Fixed in 13.0-58.30
  2. Upgrade

    Upgrade Citrix ADC to a version that resolves this vulnerability.

    Fixed in 12.1-57.18
  3. Upgrade

    Upgrade Citrix ADC to a version that resolves this vulnerability.

    Fixed in 12.0-63.21
  4. Upgrade

    Upgrade Citrix ADC to a version that resolves this vulnerability.

    Fixed in 11.1-64.14
  5. Upgrade

    Upgrade Citrix ADC to a version that resolves this vulnerability.

    Fixed in 10.5-70.18
  6. Upgrade

    Upgrade Citrix Gateway to a version that resolves this vulnerability.

    Fixed in 13.0-58.30
  7. Upgrade

    Upgrade Citrix Gateway to a version that resolves this vulnerability.

    Fixed in 12.1-57.18
  8. Upgrade

    Upgrade Citrix Gateway to a version that resolves this vulnerability.

    Fixed in 12.0-63.21
  9. Upgrade

    Upgrade Citrix Gateway to a version that resolves this vulnerability.

    Fixed in 11.1-64.14
  10. Upgrade

    Upgrade Citrix Gateway to a version that resolves this vulnerability.

    Fixed in 10.5-70.18
  11. Upgrade

    Upgrade Citrix SDWAN WAN-OP to a version that resolves this vulnerability.

    Fixed in 11.1.1a
  12. Upgrade

    Upgrade Citrix SDWAN WAN-OP to a version that resolves this vulnerability.

    Fixed in 11.0.3d
  13. Upgrade

    Upgrade Citrix SDWAN WAN-OP to a version that resolves this vulnerability.

    Fixed in 10.2.7
  14. Compensating control

    Ensure the NetScaler IP (NSIP) is not reachable from untrusted networks/hosts (restrict NSIP access to only trusted management sources), since the attacker must have access to the NSIP to exploit unauthenticated access to certain URL endpoints.

Event History

Jul 10, 2020
CVE Published
via MITRE·03:38 PM
Data Sourced
via MITRE·03:38 PM
DescriptionWeakness
Data Sourced
via NVD·04:15 PM
DescriptionSeverityWeaknessAffected Software
Nov 3, 2021
Known Exploited
via CISA·12:00 AM
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Frequently Asked Questions

1

What is CVE-2020-8193?

CVE-2020-8193 is an authorization bypass vulnerability in Citrix ADC Gateway and SD-WAN WANOP Appliance.

2

What is the severity of CVE-2020-8193?

The severity of CVE-2020-8193 is medium, with a severity value of 6.5.

3

What software is affected by CVE-2020-8193?

Citrix ADC, Citrix Gateway, and multiple Citrix SD-WAN WANOP appliance models are affected by CVE-2020-8193.

4

How can an attacker exploit CVE-2020-8193?

The attacker must have access to the NetScaler IP (NSIP) in order to exploit CVE-2020-8193.

5

Where can I find more information about CVE-2020-8193?

You can find more information about CVE-2020-8193 at the following references: [1](http://packetstormsecurity.com/files/160047/Citrix-ADC-NetScaler-Local-File-Inclusion.html), [2](https://support.citrix.com/article/CTX276688).

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