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CVE-2021-1268
CVE information
Published
Last Modified
CVSSv2.0 Severity
CVSSv3.1 Severity
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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