SB2021092416 - Denial of service in Cisco IOS and IOS XE Software
Published: September 24, 2021
Security Bulletin ID
SB2021092416
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Missing Initialization of a Variable (CVE-ID: CVE-2021-34703)
CWE-ID: CWE-456 - Missing Initialization of a Variable
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper initialization of a buffer in the Link Layer Discovery Protocol (LLDP) message parser. A remote authenticated attacker on the local network can trigger a reload of an affected device and cause a denial of service condition on the target system
Remediation
Install update from vendor's website.