CVE-2020-3477 : A vulnerability in the CLI parser of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, local at

A vulnerability in the CLI parser of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, local attacker to access files from the flash: filesystem. The vulnerability is due to insufficient application of restrictions during the execution of a specific command. An attacker could exploit this vulnerability by using a specific command at the command line. A successful exploit could allow the attacker to obtain read-only access to files that are located on the flash: filesystem that otherwise might not have been accessible.

Published 2020-09-24 18:15:20

Updated 2021-08-06 19:05:17

Source Cisco Systems, Inc.

View at NVD, CVE.org

Vulnerability category: Input validation

Exploit prediction scoring system (EPSS) score for CVE-2020-3477

EPSS FAQ

0.04%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 6 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-3477

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
2.1	LOW	AV:L/AC:L/Au:N/C:P/I:N/A:N	3.9	2.9	NIST
Access Vector: Local Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: None Availability Impact: None
5.5	MEDIUM	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N	1.8	3.6	Cisco Systems, Inc.
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: High Integrity: None Availability: None
5.5	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N	1.8	3.6	NIST
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: High Integrity: None Availability: None

CWE ids for CVE-2020-3477

CWE-20 Improper Input Validation

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: ykramarz@cisco.com (Secondary)

CWE-863 Incorrect Authorization

The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.

Assigned by: nvd@nist.gov (Primary)

Products affected by CVE-2020-3477

Cisco » IOS » Version: 16.3.11
cpe:2.3:o:cisco:ios:16.3.11:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » 2610xm » Version: N/A
When used together with: Cisco » 2611xm » Version: N/A
When used together with: Cisco » 2612 » Version: N/A
When used together with: Cisco » 2620xm » Version: N/A
When used together with: Cisco » 2621xm » Version: N/A
When used together with: Cisco » 2650xm » Version: N/A
When used together with: Cisco » 2651xm » Version: N/A
When used together with: Cisco » 2691 » Version: N/A

Vulnerability Details : CVE-2020-3477

Exploit prediction scoring system (EPSS) score for CVE-2020-3477

CVSS scores for CVE-2020-3477

CWE ids for CVE-2020-3477

References for CVE-2020-3477

Products affected by CVE-2020-3477