Improper input validation in Cisco Catalyst 4503-E
CVE-2020-3235
A vulnerability in the Simple Network Management Protocol (SNMP) subsystem of Cisco IOS Software and Cisco IOS XE Software on Catalyst 4500 Series Switches could allow an authenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to insufficient input validation when the software processes specific SNMP object identifiers. An attacker could exploit this vulnerability by sending a crafted SNMP packet to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Note: To exploit this vulnerability by using SNMPv2c or earlier, the attacker must know the SNMP read-only community string for an affected system. To exploit this vulnerability by using SNMPv3, the attacker must know the user credentials for the affected system.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.016 (74.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 74.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000
Affected products
- Cisco Catalyst 4503-E
- Cisco Catalyst 4506-E
- Cisco Catalyst 4507r\+e
- Cisco Catalyst 4510r\+e
- Cisco iOS 12.2(53)sg1
- Cisco iOS — versions 15.2(4)e7, 15.1(2)sg2, 12.2(53)sg6
- Cisco iOS Xe — versions 3.2.0sg, 3.2.1sg, 3.2.2sg
- Oracle Goldengate Management Pack — versions 12.2.1.2.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snmp-dos… (vendor-advisory, Vendor Advisory)
- www.oracle.com/security-alerts/cpuoct2020.html (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-3235?
- CVE-2020-3235 is a high-severity vulnerability in Cisco Catalyst 4503-E, classified under Incorrect Access of Indexable Resource ('Range Error'). CVSS score: 7.7/10. Published 2020-06-03.
- How severe is CVE-2020-3235?
- High severity. CVSS v3 base score is 7.7 out of 10.
- Is CVE-2020-3235 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.