CVE-2017-17549

Name: CVE-2017-17549
Creator: NVD / NIST
Published: 2017-12-13T16:29:00.393+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.57%

Last modified Jun 17, 2026

CVE-2017-17549 is a vulnerability of currently unknown severity. Citrix NetScaler Application Delivery Controller (ADC) and NetScaler Gateway 10.5 before build 67.13, 11.0 before build 71.22, 11.1 before build 56.19, and 12.0 before build 53.22 allow remote attackers to obtain sensitive information from the backend client TLS handshake by leveraging use of TLS with Client Certificates and a Diffie-Hellman Ephemeral (DHE) key exchange.. EPSS estimates a 1.57% chance of exploitation in the next 30 days.

Description

Citrix NetScaler Application Delivery Controller (ADC) and NetScaler Gateway 10.5 before build 67.13, 11.0 before build 71.22, 11.1 before build 56.19, and 12.0 before build 53.22 allow remote attackers to obtain sensitive information from the backend client TLS handshake by leveraging use of TLS with Client Certificates and a Diffie-Hellman Ephemeral (DHE) key exchange.

Metrics

EPSS Probability

1.57%

72.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Citrix	Application Delivery Controller Firmware	10.5
Citrix	Application Delivery Controller Firmware	11.0
Citrix	Application Delivery Controller Firmware	11.1
Citrix	Application Delivery Controller Firmware	12.0
Citrix	Netscaler Gateway Firmware	10.5
Citrix	Netscaler Gateway Firmware	11.0
Citrix	Netscaler Gateway Firmware	11.1
Citrix	Netscaler Gateway Firmware	12.0

References

http://www.securityfocus.com/bid/102177Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040011Third Party Advisory, VDB Entry
https://support.citrix.com/article/ctx230612Vendor Advisory
http://www.securityfocus.com/bid/102177Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040011Third Party Advisory, VDB Entry
https://support.citrix.com/article/ctx230612Vendor Advisory

Timeline

Published: Dec 13, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-17549?

How severe is CVE-2017-17549?

Severity scoring for CVE-2017-17549 is pending analysis. The EPSS model estimates a 1.57% probability of exploitation in the next 30 days.

How do I fix CVE-2017-17549?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-17549?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST