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

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CVE-2018-0241

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
19/04/2018
Last modified:
09/10/2019

Description

A vulnerability in the UDP broadcast forwarding function of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on the affected device. The vulnerability is due to improper handling of UDP broadcast packets that are forwarded to an IPv4 helper address. An attacker could exploit this vulnerability by sending multiple UDP broadcast packets to the affected device. An exploit could allow the attacker to cause a buffer leak on the affected device, eventually resulting in a DoS condition requiring manual intervention to recover. This vulnerability affects all Cisco IOS XR platforms running 6.3.1, 6.2.3, or earlier releases of Cisco IOS XR Software when at least one IPv4 helper address is configured on an interface of the device. Cisco Bug IDs: CSCvi35625.

Impact

Vector 3.x
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.40 HIGH
Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

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

Base Score 3.x
7.40
Severity 3.x
HIGH
Vector 2.0
AV:A/AC:L/Au:N/C:N/I:N/A:C CVSS v2.0 Severity and Metrics:

Base Score: 6.10 MEDIUM
Vector: AV:A/AC:L/Au:N/C:N/I:N/A:C

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

Base Score 2.0
6.10
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:cisco:ios_xr:4.0.4.base:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:4.1.3.base:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:4.2.4.base:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:4.3.4.base:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:4.4.3.ce:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:5.0.3.ce:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:5.1.4.base:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:5.2.5.ce:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:5.3.4.base:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:5.4.3.ce:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.0.4.base:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.1.4.base:*:*:*:*:*:*:*
cpe:2.3:o:cisco:ios_xr:6.2.3.base:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_9001:-:*:*:*:*:*:*:*
cpe:2.3:h:cisco:asr_9006:-:*:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools