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CVE-2021-34714
Detail
Modified
This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.
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.
NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.
Note: NVD Analysts have not published a CVSS score for this CVE at this time. NVD Analysts use publicly available information at the time of analysis to associate CVSS vector strings.
NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.
Note: The NVD and the CNA have provided the same score. When this occurs only the CNA information is displayed, but the Acceptance Level icon for the CNA is given a checkmark to signify NVD concurrence.
NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.
Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.
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AND
OR
*cpe:2.3:a:cisco:ios_xe:*:*:*:*:*:*:*:* versions up to (including) 3.2\(3o\)a
*cpe:2.3:o:cisco:fx-os:*:*:*:*:*:*:*:* versions up to (including) 3.2\(3o\)a
*cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:* versions up to (including) 3.2\(3o\)a
*cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* versions up to (including) 3.2\(3o\)a
*cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:* versions up to (including) 3.2\(3o\)a
OR
cpe:2.3:h:cisco:ucs_6200:-:*:*:*:*:
AND
OR
*cpe:2.3:a:cisco:ios_xe:*:*:*:*:*:*:*:* versions up to (including) 4.1\(1a\)a
*cpe:2.3:o:cisco:fx-os:*:*:*:*:*:*:*:* versions up to (including) 4.1\(1a\)a
*cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:* versions up to (including) 4.1\(1a\)a
*cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* versions up to (including) 4.1\(1a\)a
*cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:* versions up to (including) 3.2\(3o\)a
OR
cpe:2.3:h:cisco:ucs_6400:-:*:*:*:*:
AND
OR
*cpe:2.3:a:cisco:ios_xe:*:*:*:*:*:*:*:* versions up to (including) 7.0\(3\)i7\(9\)
*cpe:2.3:o:cisco:fx-os:*:*:*:*:*:*:*:* versions up to (including) 7.0\(3\)i7\(9\)
*cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:* versions up to (including) 7.0\(3\)i7\(9\)
*cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* versions up to (including) 7.0\(3\)i7\(9\)
*cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:* versions up to (including) 7.0\(3\)i7\(9\)
OR
cpe:2.3:h:
AND
OR
*cpe:2.3:a:cisco:ios_xe:*:*:*:*:*:*:*:* versions up to (including) 7.3\(8\)n1\(1\)
*cpe:2.3:o:cisco:fx-os:*:*:*:*:*:*:*:* versions up to (including) 7.3\(8\)n1\(1\)
*cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:* versions up to (including) 7.3\(8\)n1\(1\)
*cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* versions up to (including) 7.3\(8\)n1\(1\)
*cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:* versions up to (including) 7.3\(8\)n1\(1\)
OR
cpe:2.3:h:
AND
OR
*cpe:2.3:a:cisco:ios_xe:*:*:*:*:*:*:*:* versions up to (including) 8.4\(3.115\)
*cpe:2.3:o:cisco:fx-os:*:*:*:*:*:*:*:* versions up to (including) 8.4\(3.115\)
*cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:* versions up to (including) 8.4\(3.115\)
*cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* versions up to (including) 8.4\(3.115\)
*cpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:* versions up to (including) 8.4\(3.115\)
OR
cpe:2.3:h:cisco:mds_9000:
AND
OR
*cpe:2.3:o:cisco:fxos:*:*:*:*:*:*:*:* versions from (including) 2.2 up to (excluding) 2.2.2.148
*cpe:2.3:o:cisco:fxos:*:*:*:*:*:*:*:* versions from (including) 2.3 up to (excluding) 2.3.1.216
*cpe:2.3:o:cisco:fxos:*:*:*:*:*:*:*:* versions from (including) 2.4 up to (excluding) 2.4.1.273
*cpe:2.3:o:cisco:fxos:*:*:*:*:*:*:*:* versions from (including) 2.6 up to (excluding) 2.6.1.224
*cpe:2.3:o:cisco:fxos:*:*:*:*:*:*:*:* versions from (i
Added
CVSS V2
NIST (AV:A/AC:M/Au:N/C:N/I:N/A:C)
Added
CVSS V3.1
NIST AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Added
CWE
NIST CWE-20
Changed
Reference Type
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-nxos-xr-udld-dos-W5hGHgtQ No Types Assigned
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