NULL pointer dereference in Cisco iOS Xe Software
CVE-2022-20682
A vulnerability in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol processing of Cisco IOS XE Wireless Controller Software for the Catalyst 9000 Family could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to inadequate input validation of incoming CAPWAP packets encapsulating multicast DNS (mDNS) queries. An attacker could exploit this vulnerability by connecting to a wireless network and sending a crafted mDNS query, which would flow through and be processed by the wireless controller. A successful exploit could allow the attacker to cause the affected device to crash and reload, resulting in a DoS condition.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.013 (71.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000
Affected products
- Cisco iOS Xe Software
- Cisco iOS Xe — versions 3.15.1xbs, 3.15.2xbs, 16.11.1
Weakness classification (CWE)
References
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-c9800-ca… (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2022-20682?
- CVE-2022-20682 is a high-severity vulnerability in Cisco iOS Xe Software, classified under CWE-690. CVSS score: 8.6/10. Published 2022-04-15.
- How severe is CVE-2022-20682?
- High severity. CVSS v3 base score is 8.6 out of 10.