CVE-2017-12270

Name: CVE-2017-12270
Creator: NVD / NIST
Published: 2017-10-05T07:29:00.777+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.30%

Last modified Jun 17, 2026

CVE-2017-12270 is a vulnerability of currently unknown severity. A vulnerability in the gRPC code of Cisco IOS XR Software for Cisco Network Convergence System (NCS) 5500 Series Routers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition when the emsd service stops. The vulnerability is due to the software's inability to process HTTP/2 packets. EPSS estimates a 2.30% chance of exploitation in the next 30 days.

Description

A vulnerability in the gRPC code of Cisco IOS XR Software for Cisco Network Convergence System (NCS) 5500 Series Routers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition when the emsd service stops. The vulnerability is due to the software's inability to process HTTP/2 packets. An attacker could exploit this vulnerability by sending a malformed HTTP/2 frame to the affected device. A successful exploit could allow the attacker to create a DoS condition when the emsd service stops. Cisco Bug IDs: CSCvb99388.

Metrics

EPSS Probability

2.30%

81.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Cisco	Ios Xr	All versions

References

http://www.securityfocus.com/bid/101171Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039504Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171004-ncsVendor Advisory
http://www.securityfocus.com/bid/101171Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039504Third Party Advisory, VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20171004-ncsVendor Advisory

Timeline

Published: Oct 5, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-12270?

How severe is CVE-2017-12270?

Severity scoring for CVE-2017-12270 is pending analysis. The EPSS model estimates a 2.30% probability of exploitation in the next 30 days.

How do I fix CVE-2017-12270?

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-2017-12270?

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

Scan your code now

Source: NVD / NIST