Improper Initialization in Cisco IOS XE - CVE-2021-34697
Published: September 24, 2021
Vulnerability identifier: #VU56865
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-34697
CWE-ID: CWE-665
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper initialization in the Protection Against Distributed Denial of Service Attacks feature. A remote attacker can cause a denial of service condition on the target system.
Affected software
Cisco IOS XE
How to mitigate CVE-2021-34697
Install update from vendor's website.
Cisco IOS XE - addressed in versions 17.3.3, 17.3.4a, 17.4.2, 17.5.1a, 17.6.1a