CVE-2017-6627

Known Exploited

Description

A vulnerability in the UDP processing code of Cisco IOS 15.1, 15.2, and 15.4 and IOS XE 3.14 through 3.18 could allow an unauthenticated, remote attacker to cause the input queue of an affected system to hold UDP packets, causing an interface queue wedge and a denial of service (DoS) condition. The vulnerability is due to Cisco IOS Software application changes that create UDP sockets and leave the sockets idle without closing them. An attacker could exploit this vulnerability by sending UDP packets with a destination port of 0 to an affected device. A successful exploit could allow the attacker to cause UDP packets to be held in the input interfaces queue, resulting in a DoS condition. The input interface queue will stop holding UDP packets when it receives 250 packets. Cisco Bug IDs: CSCup10024, CSCva55744, CSCva95506.

Categories

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 10.89% Top 10%
KEV Since 
Vendor Advisory cisco.com
Affected: n/a Cisco IOS and Cisco IOS XE
Published at:
Updated at:

References

Link Tags
http://www.securityfocus.com/bid/100644 vdb entry third party advisory
http://www.securitytracker.com/id/1039289 vdb entry third party advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170906-ios-udp mitigation vendor advisory

Frequently Asked Questions

What is the severity of CVE-2017-6627?
CVE-2017-6627 has been scored as a high severity vulnerability.
How to fix CVE-2017-6627?
To fix CVE-2017-6627, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-6627 being actively exploited in the wild?
It is confirmed that CVE-2017-6627 is actively exploited. Be extra cautious if you are using vulnerable components. According to its EPSS score, there is a ~11% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-6627?
CVE-2017-6627 affects n/a Cisco IOS and Cisco IOS XE.
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