Citrix Application Delivery Management (Citrix…: Improper Access Control
CVE-2022-27511 is a high-severity improper access control vulnerability in Citrix Application Delivery Management (Citrix ADM) from Citrix, with a CVSS 3.1 base score of 8.1 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists versions 13.1-21.53, 13.0-85.19 as the first without the flaw, so updating Citrix Application Delivery Management (Citrix ADM) to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 12.7% chance of exploitation within 30 days, which is in the top 3.67% of all scored CVEs.
EPSS places it among the vulnerabilities most likely to be exploited soon.
What to do
- Update Citrix Application Delivery Management (Citrix ADM) to 13.1-21.53 or 13.0-85.19, whichever matches your release line, or a later version.
- Update Application Delivery Management to 13.0-85.19 or 13.1-21.53, whichever matches your release line, or a later version.
- Read the advisory on support.citrix.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Citrix | Citrix Application Delivery Management (Citrix ADM) | before 13.1-21.53; before 13.0-85.19 | 13.1-21.53, 13.0-85.19 |
| Citrix | Application Delivery Management | before 13.0-85.19; 13.1 up to, but not including, 13.1-21.53 | 13.0-85.19, 13.1-21.53 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- HighSuccess depends on conditions outside the attacker's control.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 8.1 | High | NVD |
| CVSS 2.0 | 7.8 | High | NVD |
Official description
Corruption of the system by a remote, unauthenticated user. The impact of this can include the reset of the administrator password at the next device reboot, allowing an attacker with ssh access to connect with the default administrator credentials after the device has rebooted.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Access Control
The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
How developers prevent this class of flaw
- Very carefully manage the setting, management, and handling of privileges. Explicitly manage trust zones in the software.
- Compartmentalize the system to have safe areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area. Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Recent Improper Access Control vulnerabilities
- 10.0 Critical severity
- 7.5 High severity
- 7.3 High severity
- 8.8 High severity
- 7.8 High severity
- 9.8 Critical severity
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