CVE-2021-34714

CWE-20 — Improper Input Validation4 documents4 sources
Severity
7.4HIGH
EPSS
0.2%
top 59.79%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
7
Cisco FxosCisco Firepower Extensible Operating SystemCisco IOS+4 more
Timeline
PublishedSep 23
Latest updateMay 24

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 at…

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:HExploitability: 2.8 | Impact: 4.0

Affected Packages7 packages

▶NVDcisco/fxos2.2 — 2.2.2.148+6
▶NVDcisco/ios8.4\(3.115\)+4
▶NVDcisco/nx-os8.4\(3.115\)+3
▶NVDcisco/ios_xe8.4\(3.115\)+4
▶NVDcisco/ios_xr8.4\(3.115\)+4

🔴Vulnerability Details

2
GHSA
GHSA-wjvw-6gq9-r937: A vulnerability in the Unidirectional Link Detection (UDLD) feature of Cisco FXOS Software, Cisco IOS Software, Cisco IOS XE Software, Cisco IOS XR So↗2022-05-24
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CVEList
Multiple Cisco Operating Systems Unidirectional Link Detection Denial of Service Vulnerability↗2021-09-23
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📋Vendor Advisories

1
Cisco
Multiple Cisco Operating Systems Unidirectional Link Detection Denial of Service Vulnerability↗2021-09-22
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