CVE-2017-12309

Name: CVE-2017-12309
Creator: NVD / NIST
Published: 2017-11-16T07:29:00.57+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.66%

Last modified Jun 17, 2026

CVE-2017-12309 is a vulnerability of currently unknown severity. A vulnerability in the Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to conduct a HTTP response splitting attack. The vulnerability is due to the failure of the application or its environment to properly sanitize input values. EPSS estimates a 1.66% chance of exploitation in the next 30 days.

Description

A vulnerability in the Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to conduct a HTTP response splitting attack. The vulnerability is due to the failure of the application or its environment to properly sanitize input values. An attacker could exploit this vulnerability by injecting malicious HTTP headers, controlling the response body, or splitting the response into multiple responses. An exploit could allow the attacker to perform cross-site scripting attacks, cross-user defacement, web cache poisoning, and similar exploits. Cisco Bug IDs: CSCvf16705.

Metrics

EPSS Probability

1.66%

73.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Email Security Appliance Firmware	10.0.2-020
Cisco	Email Security Appliance Firmware	11.0.0-105

References

http://www.securityfocus.com/bid/101928Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039831Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171115-esaVendor Advisory
http://www.securityfocus.com/bid/101928Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039831Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171115-esaVendor Advisory

Timeline

Published: Nov 16, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-12309?

How severe is CVE-2017-12309?

Severity scoring for CVE-2017-12309 is pending analysis. The EPSS model estimates a 1.66% probability of exploitation in the next 30 days.

How do I fix CVE-2017-12309?

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-2017-12309?

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

Scan your code now

Source: NVD / NIST