CVE-2020-8193

Citrix Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance: ADC, Gateway, and SD-WAN WANOP Appliance Authorization Bypass

As of , CVE-2020-8193 in Citrix Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch this week.

Exploited
Yes: CISA listed it on 3 November 2021
US federal deadline
3 May 2022181 days after CISA listed it. US federal civilian agencies must fix it by then.
Used in ransomware campaigns
Not known to CISA
EPSS score
0.88Higher than 99% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
EPSS when listed
Not availableCISA listed it before 4 February 2022, where the EPSS files we read begin.
Public exploit
None foundNeither Metasploit nor Exploit-DB lists one.
Fix
No vendor link in CISA's entry

What CISA says to do

Apply updates per vendor instructions.

CISA's required action

What the flaw is

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's description

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.

The CVE record's description, from hackerone

CVE published
10 July 2020
Assigned by
hackerone
CVSS
6.5 Medium (CVSS 3.1, from CISA-ADP)
CWE-284
Improper Access Control
CISA SSVC, exploitation
active
CISA SSVC, automatable
yes
CISA SSVC, technical impact
partial

Timeline

  1. The CVE record was published.
  2. CISA added it to its list of exploited vulnerabilities.
  3. The US federal deadline to fix it.

Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance: other exploited entries

VulnerabilityProductOur groupListedDeadlineEPSS
CVE-2019-19781ADC, Gateway, and SD-WAN WANOP Appliance Code ExecutionCitrix Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP AppliancePatch this weekRansomware use; Metasploit module; EPSS 0.990.99
CVE-2020-8195ADC, Gateway, and SD-WAN WANOP Appliance Information DisclosureCitrix Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP AppliancePatch soon0.33
CVE-2020-8196ADC, Gateway, and SD-WAN WANOP Appliance Information DisclosureCitrix Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP AppliancePatch soon0.26

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