Auth bypass in Cisco iOS 15.2(5a)e
CVE-2020-3231
A vulnerability in the 802.1X feature of Cisco Catalyst 2960-L Series Switches and Cisco Catalyst CDB-8P Switches could allow an unauthenticated, adjacent attacker to forward broadcast traffic before being authenticated on the port. The vulnerability exists because broadcast traffic that is received on the 802.1X-enabled port is mishandled. An attacker could exploit this vulnerability by sending broadcast traffic on the port before being authenticated. A successful exploit could allow the attacker to send and receive broadcast traffic on the 802.1X-enabled port before authentication.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (36.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Cisco iOS 15.2(5a)e
- Cisco iOS — versions 15.2(6)e2b, 15.2(5c)e, 15.3(3)jpj
Weakness classification (CWE)
References
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-c2960L-D… (vendor-advisory, Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-3231?
- CVE-2020-3231 is a medium-severity vulnerability in Cisco iOS 15.2(5a)e, classified under Improper Access Control. CVSS score: 4.7/10. Published 2020-06-03.
- How severe is CVE-2020-3231?
- Medium severity. CVSS v3 base score is 4.7 out of 10.