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 2020-06-03 18:15:21
Updated 2021-09-17 18:49:01
View at NVD,   CVE.org
Vulnerability category: Input validationDenial of service

Products affected by CVE-2020-3235

Exploit prediction scoring system (EPSS) score for CVE-2020-3235

0.06%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 28 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-3235

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
6.3
MEDIUM AV:N/AC:M/Au:S/C:N/I:N/A:C
6.8
6.9
NIST
7.7
HIGH CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
3.1
4.0
Cisco Systems, Inc.
7.7
HIGH CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
3.1
4.0
NIST

CWE ids for CVE-2020-3235

  • The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
    Assigned by: nvd@nist.gov (Primary)
  • The product does not restrict or incorrectly restricts operations within the boundaries of a resource that is accessed using an index or pointer, such as memory or files.
    Assigned by: ykramarz@cisco.com (Secondary)

References for CVE-2020-3235

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