CVE-2021-34703 — Missing Initialization of a Variable in Cisco IOS

CWE-456 — Missing Initialization of a VariableCWE-665 — Improper Initialization4 documents4 sources
Severity
6.5MEDIUMNVD
CNA6.8
EPSS
0.2%
top 52.36%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Cisco IOSCisco IOS XECisco IOS
Timeline
PublishedSep 23
Latest updateMay 24

Description

A vulnerability in the Link Layer Discovery Protocol (LLDP) message parser of Cisco IOS Software and Cisco IOS XE Software could allow an attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition. This vulnerability is due to improper initialization of a buffer. An attacker could exploit this vulnerability via any of the following methods: An authenticated, remote attacker could access the LLDP neighbor table via either the CLI or SNMP while the device …

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 2.8 | Impact: 3.6

Affected Packages3 packages

▶NVDcisco/ios16.12.3
▶NVDcisco/ios_xe16.12.3
▶CVEListV5cisco/cisco_iosn/a

🔴Vulnerability Details

2
GHSA
GHSA-h43v-fh8q-w87r: A vulnerability in the Link Layer Discovery Protocol (LLDP) message parser of Cisco IOS Software and Cisco IOS XE Software could allow an attacker to↗2022-05-24
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CVEList
Cisco IOS and IOS XE Software Link Layer Discovery Protocol Denial of Service Vulnerability↗2021-09-23
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📋Vendor Advisories

1
Cisco
Cisco IOS and IOS XE Software Link Layer Discovery Protocol Denial of Service Vulnerability↗2021-09-22
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CVE-2021-34703 — Missing Initialization of a Variable | cvebase