CVE-2021-1439
CVSS V2 Low 3.3
CVSS V3 High 7.4
Description
A vulnerability in the multicast DNS (mDNS) gateway feature of Cisco Aironet Series Access Points Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient input validation of incoming mDNS traffic. An attacker could exploit this vulnerability by sending a crafted mDNS packet to an affected device through a wireless network that is configured in FlexConnect local switching mode or through a wired network on a configured mDNS VLAN. A successful exploit could allow the attacker to cause the access point (AP) to reboot, resulting in a DoS condition.
Overview
- CVE ID
- CVE-2021-1439
- Assigner
- ykramarz@cisco.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-03-24T20:15:14
- Last Modified Date
- 2021-03-31T16:57:17
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| AND | ||||
| cpe:2.3:a:cisco:aironet_access_point_software:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:h:cisco:aironet_1540:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:aironet_1560:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:aironet_1800:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:aironet_2800:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:aironet_3800:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:aironet_4800:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:catalyst_9100:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:catalyst_iw6300:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:esw6300:-:*:*:*:*:*:*:* | 0 | OR | ||
| cpe:2.3:h:cisco:isr_1100:-:*:*:*:*:*:*:* | 0 | OR | ||
| AND | ||||
| cpe:2.3:o:cisco:catalyst_9800_firmware:*:*:*:*:*:*:*:* | 1 | OR | 17.1 | 17.3.3 |
| cpe:2.3:h:cisco:catalyst_9800:-:*:*:*:*:*:*:* | 0 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:A/AC:L/Au:N/C:N/I:N/A:P
- Access Vector
- ADJACENT_NETWORK
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- NONE
- Availability Impact
- PARTIAL
- Base Score
- 3.3
- Severity
- LOW
- Exploitability Score
- 6.5
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
- Attack Vector
- ADJACENT_NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- CHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- HIGH
- Base Score
- 7.4
- Base Severity
- HIGH
- Exploitability Score
- 2.8
- Impact Score
- 4
References
| Reference URL | Reference Tags |
|---|---|
| https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-aironet-mdns-dos-E6KwYuMx | Vendor Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-1439 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1439 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 07:17:37 | Added to TrackCVE | |||
| 2022-12-06 00:20:46 | psirt@cisco.com | ykramarz@cisco.com | CVE Assigner | updated |
| 2022-12-06 00:20:46 | 2021-03-24T20:15Z | 2021-03-24T20:15:14 | CVE Published Date | updated |
| 2022-12-06 00:20:46 | 2021-03-31T16:57:17 | CVE Modified Date | updated | |
| 2022-12-06 00:20:46 | Analyzed | Vulnerability Status | updated |