CVE-2021-22956

Published on: 12/07/2021 12:00:00 AM UTC

Last Modified on: 12/08/2021 07:01:00 PM UTC

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Certain versions of Application Delivery Controller from Citrix contain the following vulnerability:

An uncontrolled resource consumption vulnerability exists in Citrix ADC <13.0-83.27, <12.1-63.22 and 11.1-65.23 that could allow an attacker with access to NSIP or SNIP with management interface access to cause a temporary disruption of the Management GUI, Nitro API, and RPC communication.

  • CVE-2021-22956 has been assigned by URL Logo [email protected] to track the vulnerability - currently rated as HIGH severity.

CVSS3 Score: 7.5 - HIGH

Attack
Vector
Attack
Complexity
Privileges
Required
User
Interaction
NETWORK LOW NONE NONE
Scope Confidentiality
Impact
Integrity
Impact
Availability
Impact
UNCHANGED NONE NONE HIGH

CVSS2 Score: 4.3 - MEDIUM

Access
Vector
Access
Complexity
Authentication
NETWORK MEDIUM NONE
Confidentiality
Impact
Integrity
Impact
Availability
Impact
NONE NONE PARTIAL

CVE References

Description Tags Link
Citrix Application Delivery Controller, Citrix Gateway, and Citrix SD-WAN WANOP Edition appliance Security Update support.citrix.com
text/html
URL Logo MISC support.citrix.com/article/CTX330728

Related QID Numbers

  • 376084 Citrix ADC and NetScaler Gateway Temporary disruption of the Management GUI Vulnerability (CTX330728)
  • 376085 Citrix ADC and Citrix Gateway Unauthenticated Denial of Service (DoS) Vulnerability (CTX330728)

Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
Hardware Device InfoCitrixApplication Delivery Controller-AllAllAll
Operating
System
CitrixApplication Delivery Controller FirmwareAllAllAllAll
ApplicationCitrixGatewayAllAllAllAll
ApplicationCitrixSd-wanAllAllAllAll
  • cpe:2.3:h:citrix:application_delivery_controller:-:*:*:*:*:*:*:*:
  • cpe:2.3:o:citrix:application_delivery_controller_firmware:*:*:*:*:*:*:*:*:
  • cpe:2.3:a:citrix:gateway:*:*:*:*:*:*:*:*:
  • cpe:2.3:a:citrix:sd-wan:*:*:*:*:wanop:*:*:*:

Social Mentions

Source Title Posted (UTC)
Twitter Icon @cloudDNA Heads up! New Citrix #ADC (#NetScaler) #CVE announced - CVE-2021-22955 and CVE-2021-22956. Critical for #VPN and… twitter.com/i/web/status/1… 2021-11-09 14:15:17
Twitter Icon @IFTECHAG Wichtige Info zur #Citrix Sicherheitslücke CVE-2021-22956: Nach dem erfolgten Upgrade muss eine weiterführende Anpa… twitter.com/i/web/status/1… 2021-11-10 08:58:38
Twitter Icon @autumn_good_35 CVE-2021-22955 、CVE-2021-22956 CTX330728 Citrix Application Delivery Controller, Citrix Gateway, and Citrix SD-WAN… twitter.com/i/web/status/1… 2021-11-10 12:32:59
Twitter Icon @SystemTek_UK Citrix Patches Critical Vulnerability in ADC Gateway [CVE-2021-22955 and CVE-2021-22956] systemtek.co.uk/2021/11/citrix… 2021-11-11 08:55:04
Twitter Icon @6townstechteam Citrix Patches Critical Vulnerability in ADC Gateway [CVE-2021-22955 and CVE-2021-22956] systemtek.co.uk/2021/11/citrix… 2021-11-11 08:55:05
Twitter Icon @CVEreport CVE-2021-22956 : An uncontrolled resource consumption vulnerability exists in Citrix ADC <13.0-83.27, <12.1-63.22 a… twitter.com/i/web/status/1… 2021-12-07 14:08:56
Reddit Logo Icon /r/netcve CVE-2021-22956 2021-12-07 15:38:54
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