SB2022092838 - Denial of service in Cisco Catalyst 9000 DHCP TLV caching feature
Published: September 28, 2022
Security Bulletin ID
SB2022092838
CSH Severity
Medium
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) Resource management error (CVE-ID: CVE-2022-20847)
CWE-ID: CWE-399 - Resource Management Errors
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper management of internal resources when handling DHCP messages with enabled DHCP TLV caching feature. A remote attacker can send specially crafted DHCP messages to the device and perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.