Assessment
Why it matters
CISA lists this vulnerability as known to be exploited; exploitation is confirmed; EPSS is 33.3%; technical severity is CVSS 6.5.
Improper input validation 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 resulting in limited information disclosure to low privileged users.
Who should care
- Teams operating Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance, Application Delivery Controller Firmware, Gateway Firmware +3 more
- Vulnerability and exposure management teams
- Security operations teams monitoring exploitation activity
Response plan
What I would do
- Confirm whether Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance, Application Delivery Controller Firmware, Gateway Firmware +3 more is present in the environment.
- Identify affected versions and establish whether vulnerable services are exposed or reachable.
- Citrix Security advisory CTX276688
- Review relevant security telemetry for evidence of attempted or successful exploitation.
- Document the remediation decision and track it to verified completion.
Treatment intelligence
Remediation intelligence
Vendor sources are listed before government and third-party guidance. Confirm product applicability and change prerequisites before deployment.
Verification noteAutomated link verification has not completed for this guidance yet.
Technical details
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- CWE
- CWE-20
- Affected versions
- Citrix Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance; Citrix Application Delivery Controller Firmware (Start Including 10.5, End Excluding 10.5-70.18 | Start Including 11.1, End Excluding 11.1-64.14 | Start Including 12.0, End Excluding 12.0-63.21 | Start Including 12.1, End Excluding 12.1-57.18); Citrix Gateway Firmware (Start Including 13.0, End Excluding 13.0-58.30); Citrix Gateway Plug-in For Linux (End Excluding 1.0.0.137); Citrix Netscaler Gateway Firmware (Start Including 10.5, End Excluding 10.5-70.18 | Start Including 11.1, End Excluding 11.1-64.14 | Start Including 12.0, End Excluding 12.0-63.21 | Start Including 12.1, End Excluding 12.1-57.18); Citrix Sd-wan Wanop (Start Including 10.2, End Excluding 10.2.7 | Start Including 11.0, End Excluding 11.0.3d | Start Including 11.1, End Excluding 11.1.1a)
- Fixed versions
- Citrix Application Delivery Controller Firmware (Fixed from 10.5-70.18, 11.1-64.14, 12.0-63.21, 12.1-57.18, 13.0-58.30); Citrix Gateway Firmware (Fixed from 13.0-58.30); Citrix Gateway Plug-in For Linux (Fixed from 1.0.0.137); Citrix Netscaler Gateway Firmware (Fixed from 10.5-70.18, 11.1-64.14, 12.0-63.21, 12.1-57.18); Citrix Sd-wan Wanop (Fixed from 10.2.7, 11.0.3d, 11.1.1a)
- Published
- 10 July 2020
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
Signal timeline
- CVE published
- Added to CISA KEV
- Latest EPSS score: 33.3%
- Signal calculated at 73