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CVE-2021-1268

CVE information

Published

1 year ago

Last Modified

1 year ago

CVSSv2.0 Severity

Low

CVSSv3.1 Severity

Medium

Impact Analysis

Description

A vulnerability in the IPv6 protocol handling of the management interfaces of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause an IPv6 flood on the management interface network of an affected device. The vulnerability exists because the software incorrectly forwards IPv6 packets that have an IPv6 node-local multicast group address destination and are received on the management interfaces. An attacker could exploit this vulnerability by connecting to the same network as the management interfaces and injecting IPv6 packets that have an IPv6 node-local multicast group address destination. A successful exploit could allow the attacker to cause an IPv6 flood on the corresponding network. Depending on the number of Cisco IOS XR Software nodes on that network segment, exploitation could cause excessive network traffic, resulting in network degradation or a denial of service (DoS) condition..

CVSSv2.0 Score

Severity
Low
Base Score
3.3/10
Exploit Score
6.5/10
Access Vector
Adjacent_network
Access Complexity
Low
Authentication Required
None
Impact Score
2.9/10
Confidentiality Impact
None
Availability Impact
Partial
Integrity Impact
None

CVSSv3.1 Score

Severity
Medium
Base Score
6.5/10
Exploit Score
2.8/10
Access Vector
Adjacent_network
Access Complexity
Low
Privileges Required
None
Impact Score
3.6/10
Confidentiality Impact
None
Availability Impact
High
Integrity Impact
None
Scope
Unchanged
User Interaction
None

Products Affected

CPE Affected Vulnerable Excluding Edit
cpe:2.3:o:cisco:ios_xr:7.3.0:*:*:*:*:*:*:*
  Yes
-
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*
  Yes
7.2.0 7.2.2
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*
  Yes
7.1.0 7.1.3
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*
  Yes
- 6.7.3
cpe:2.3:h:cisco:ncs_1002:-:*:*:*:*:*:*:*
  No
-
cpe:2.3:h:cisco:ncs_1001:-:*:*:*:*:*:*:*
  No
-

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