CVE-2021-34714
Description
A vulnerability in the Unidirectional Link Detection (UDLD) feature of Cisco FXOS Software, Cisco IOS Software, Cisco IOS XE Software, Cisco IOS XR Software, and Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause an affected device to reload. This vulnerability is due to improper input validation of the UDLD packets. An attacker could exploit this vulnerability by sending specifically crafted UDLD packets to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a denial of service (DoS) condition. Note: The UDLD feature is disabled by default, and the conditions to exploit this vulnerability are strict. An attacker must have full control of a directly connected device. On Cisco IOS XR devices, the impact is limited to the reload of the UDLD process.
Risk Information
Associated Vulnerability
| Vulnerability | OS Platform |
|---|---|
| Multiple Cisco Operating Systems Unidirectional Link Detection Denial of Service Vulnerability For Cisco Firepower Extensible Operating System (FXOS) | NCM |
| Multiple Cisco Operating Systems Unidirectional Link Detection Denial of Service Vulnerability For Cisco IOS | NCM |
| Multiple Cisco Operating Systems Unidirectional Link Detection Denial of Service Vulnerability For Cisco IOS XE Software | NCM |
| Multiple Cisco Operating Systems Unidirectional Link Detection Denial of Service Vulnerability For Cisco NX-OS Software | NCM |
| Improper Input Validation Vulnerability (CVE-2021-34714) | NCM |
Patch Details
Click to see the patches provided by ManageEngine for this CVE
| Patch ID | Patch Description |
|---|---|
| PATCH-1706063 | Security Update for Cisco Firepower Extensible Operating System (FXOS) 4.1(3a)UCSM |
| PATCH-1706090 | Security Update for Cisco IOS Amsterdam-17.2.1r |
| PATCH-1706107 | Security Update for Cisco IOS XE Software 5.2(1)SV5(1.3a) |
| PATCH-1706149 | Security Update for Cisco NX-OS Software 4.1(3a)UCSM |
References
https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234