Insufficient Control Flow Management in Cisco IOS and Cisco IOS XE - CVE-2022-20697
Published: April 15, 2022
Vulnerability identifier: #VU62352
CSH Severity: High
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2022-20697
CWE-ID: CWE-691
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 resource management in the HTTP server code. A remote attacker can send specially crafted HTTP requests and perform a denial of service (DoS) attack.
Affected software
Cisco IOS
Cisco IOS XE
Cisco IOS XE
How to mitigate CVE-2022-20697
Install updates from vendor's website.
Cisco IOS - addressed in versions 15.2(7)E5, 15.2(8)E1, 15.9(03.00a)M4, 15.9(3)M4a
Cisco IOS XE - addressed in versions 15.2(07)E05, 15.2(08)E01, 15.9(03.00a)M04, 15.9(03)M04a
Cisco IOS XE - addressed in versions 15.2(07)E05, 15.2(08)E01, 15.9(03.00a)M04, 15.9(03)M04a