Vulnerability Details : CVE-2021-22956
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.
Products affected by CVE-2021-22956
- Citrix » Application Delivery Controller FirmwareVersions from including (>=) 12.1 and before (<) 12.1-63.22cpe:2.3:o:citrix:application_delivery_controller_firmware:*:*:*:*:*:*:*:*
- Citrix » Application Delivery Controller FirmwareVersions from including (>=) 13.0 and before (<) 13.0-83.27cpe:2.3:o:citrix:application_delivery_controller_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:citrix:application_delivery_controller_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:a:citrix:sd-wan:*:*:*:*:wanop:*:*:*
- cpe:2.3:a:citrix:sd-wan:*:*:*:*:wanop:*:*:*
- cpe:2.3:a:citrix:gateway:*:*:*:*:*:*:*:*
- cpe:2.3:a:citrix:gateway:*:*:*:*:*:*:*:*
- cpe:2.3:a:citrix:gateway:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-22956
0.51%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 64 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-22956
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:N/A:P |
8.6
|
2.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2021-22956
-
The product does not properly control the allocation and maintenance of a limited resource.Assigned by:
- nvd@nist.gov (Primary)
- support@hackerone.com (Secondary)
References for CVE-2021-22956
-
https://support.citrix.com/article/CTX330728
Citrix Application Delivery Controller, Citrix Gateway, and Citrix SD-WAN WANOP Edition appliance Security UpdateVendor Advisory
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