$ cve CVE-2017-6627 JSON

CVE-2017-6627 KEV

7.5

HIGH · CVSS 3.1 · EPSS 6.2% (pctl 93)

Patch first

On CISA KEV — known exploited in the wild, due 2022-03-24.

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.

Scoring

CVSS	7.5 (HIGH, v3.1)
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS	6.16% — more likely to be exploited than 93% of all CVEs
Weakness	CWE-399
On CISA KEV	yes — remediate by 2022-03-24
Public exploit	none known
Published	2017-09-07
Last modified	2026-06-17

CISA KEV

Name	Cisco IOS Software and Cisco IOS XE Software UDP Packet Processing Denial-of-Service Vulnerability
Added	2022-03-03
Due	2022-03-24
Vendor / product	Cisco / IOS and IOS XE Software
Ransomware use	none reported

Affected (2)

Vendor	Product
cisco	ios
cisco	ios xe

References

→ the Explorer · watch your stack · NVD