Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2017-6627

Severity CVSS v4.0:
Pending analysis
Type:
CWE-399 Resource Management Errors
Publication date:
07/09/2017
Last modified:
20/04/2025

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.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
7.50
Severity 3.x
HIGH
Vector 2.0
AV:N/AC:L/Au:N/C:N/I:N/A:P CVSS v2.0 Severity and Metrics:

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Physical

Base Score 2.0
5.00
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:cisco:ios:15.1\(2\)gc:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.1\(2\)gc1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.1\(2\)gc2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.1\(4\)gc:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.1\(4\)gc1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.1\(4\)gc2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(1\)gc:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(1\)gc1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(1\)gc2:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(2\)gc:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(3\)gc:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(3\)gc1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(3r\)gca:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(4\)gc:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios:15.2\(4\)gc1:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools