CVE-2021-22956
First published: Tue Dec 07 2021(Updated: )
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.
Credit: support@hackerone.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Citrix Application Delivery Controller Firmware | <11.1-65.23 | |
| Citrix Application Delivery Controller Firmware | >=12.1<12.1-63.22 | |
| Citrix Application Delivery Controller Firmware | >=13.0<13.0-83.27 | |
| Citrix Application Delivery Controller | ||
| Citrix Gateway | <11.1-65.23 | |
| Citrix Gateway | >=12.1<12.1-63.22 | |
| Citrix Gateway | >=13.0<13.0-65.23 | |
| Citrix SD-WAN | <10.2.9c | |
| Citrix SD-WAN | >=11.4.0<11.4.2 |
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Reference Links
Frequently Asked Questions
What is CVE-2021-22956?
CVE-2021-22956 is an uncontrolled resource consumption vulnerability in Citrix ADC <13.0-83.27, <12.1-63.22, and 11.1-65.23 that could allow an attacker to cause a temporary disruption of the Management GUI, Nitro API, and RPC communication.
Which software versions are affected by CVE-2021-22956?
CVE-2021-22956 affects Citrix ADC versions <13.0-83.27, <12.1-63.22, and 11.1-65.23.
What is the severity of CVE-2021-22956?
CVE-2021-22956 has a severity rating of 7.5 (high).
How can an attacker exploit CVE-2021-22956?
An attacker with access to NSIP or SNIP with management interface access can exploit CVE-2021-22956.
How can CVE-2021-22956 be mitigated?
Applying the recommended patches from Citrix is the best way to mitigate CVE-2021-22956.
- collector/nvd-index
- vendor/citrix
- canonical/citrix application delivery controller firmware
- version/citrix application delivery controller firmware/12.1
- version/citrix application delivery controller firmware/13.0
- canonical/citrix application delivery controller
- canonical/citrix gateway
- version/citrix gateway/12.1
- version/citrix gateway/13.0
- canonical/citrix sd-wan
- version/citrix sd-wan/11.4.0