# CVE-2016-9676: Citrix Provisioning Services buffer overflow

Source: https://junglewise.ai/threats/cve-2016-9676-citrix-provisioning-services-buffer-overflow  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2017-01-18. Updated: 2026-05-13  
License: CC BY 4.0 with a link back

CVE-2016-9676 · Severity: critical · CVSS 9.8 · Published 2017-01-18

Citrix Provisioning Services, a tool used to manage and stream operating system images to computers, contains a critical security flaw. An attacker can exploit this vulnerability to take complete control of the server without needing any login credentials. This could lead to a total compromise of the infrastructure used to deploy virtual desktops and servers across the organization.

Technologies: [Citrix Provisioning Services](https://junglewise.ai/threats/technologies/provisioning-services). Vendors: [Citrix](https://junglewise.ai/threats/vendors/citrix).

## Quick answers

**Is CVE-2016-9676 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2016-9676 being exploited in the wild.

**How severe is CVE-2016-9676?** Critical severity, with a CVSS score of 9.8, published 18 January 2017.

**Which products and versions are affected?** Citrix Provisioning Services 7.0, 7.1, 7.6, 7.7, 7.8, 7.9, 7.11.

**Is there a fix for CVE-2016-9676?** A patch was published on 2017-01-18: Citrix released version 7.12 to address the issue Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2016-9676 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2016-9676?** Check whether you run Citrix Provisioning Services at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A buffer overflow vulnerability (CWE-119) exists in Citrix Provisioning Services versions prior to 7.12. The flaw is reachable over the network and does not require authentication or user interaction. By sending specially crafted data to the service, an attacker can trigger a memory corruption event to execute arbitrary code with high privileges on the host system. Citrix addressed this issue in version 7.12 and provided security bulletin CTX219580 for affected customers.

## Affected products

- Citrix Provisioning Services 7.0, 7.1, 7.6, 7.7, 7.8, 7.9, 7.11

## Timeline

- 2016-11-23: disclosed: CVE assigned
- 2017-01-18: advisory: NVD publication date
- 2017-01-18: patched: Citrix released version 7.12 to address the issue

## References

- [http://www.securityfocus.com/bid/95620](http://www.securityfocus.com/bid/95620)
- [http://www.securitytracker.com/id/1037625](http://www.securitytracker.com/id/1037625)
- [https://support.citrix.com/article/CTX219580](https://support.citrix.com/article/CTX219580)

## Related threats

- [Citrix Provisioning Services information disclosure in kernel memory](https://junglewise.ai/threats/cve-2016-9680-citrix-provisioning-services-information-disclosure-in-kernel)
- [Citrix Provisioning Services remote code execution via function pointer overwrite](https://junglewise.ai/threats/cve-2016-9679-citrix-provisioning-services-remote-code-execution-via-function)
- [Citrix Provisioning Services use-after-free remote code execution](https://junglewise.ai/threats/cve-2016-9678-citrix-provisioning-services-use-after-free-remote-code-execution)