CVE-2021-1389
CVSS V2 Medium 6.4
CVSS V3 Medium 6.5
Description
A vulnerability in the IPv6 traffic processing of Cisco IOS XR Software and Cisco NX-OS Software for certain Cisco devices could allow an unauthenticated, remote attacker to bypass an IPv6 access control list (ACL) that is configured for an interface of an affected device. The vulnerability is due to improper processing of IPv6 traffic that is sent through an affected device. An attacker could exploit this vulnerability by sending crafted IPv6 packets that traverse the affected device. A successful exploit could allow the attacker to access resources that would typically be protected by the interface ACL.
Overview
- CVE ID
- CVE-2021-1389
- Assigner
- ykramarz@cisco.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-02-04T17:15:18
- Last Modified Date
- 2022-09-20T17:03:07
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| AND | ||||
| cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* | 1 | OR | 6.6.3 | |
| cpe:2.3:o:cisco:ios_xr:7.1.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:cisco:ios_xr:7.2.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:cisco:ncs_540:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:ncs_5501:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:ncs_5501-se:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:ncs_5502:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:ncs_5502-se:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:ncs_5508:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:ncs_5516:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:ncs_560:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:cisco:nx-os:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:cisco:nexus_3600:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:nexus_9500_r:-:*:*:*:*:*:*:* | 0 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:N/C:P/I:P/A:N
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- PARTIAL
- Availability Impact
- NONE
- Base Score
- 6.4
- Severity
- MEDIUM
- Exploitability Score
- 10
- Impact Score
- 4.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- LOW
- Availability Impact
- NONE
- Base Score
- 6.5
- Base Severity
- MEDIUM
- Exploitability Score
- 3.9
- Impact Score
- 2.5
References
| Reference URL | Reference Tags |
|---|---|
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ipv6-acl-CHgdYk8j | Vendor Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-1389 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1389 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 07:23:58 | Added to TrackCVE | |||
| 2022-12-05 21:25:33 | psirt@cisco.com | ykramarz@cisco.com | CVE Assigner | updated |
| 2022-12-05 21:25:33 | 2021-02-04T17:15Z | 2021-02-04T17:15:18 | CVE Published Date | updated |
| 2022-12-05 21:25:33 | 2022-09-20T17:03:07 | CVE Modified Date | updated | |
| 2022-12-05 21:25:33 | Analyzed | Vulnerability Status | updated |