CVE-2023-20057 : A vulnerability in the URL filtering mechanism of Cisco AsyncOS Software for Cis

A vulnerability in the URL filtering mechanism of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to bypass the URL reputation filters on an affected device. This vulnerability is due to improper processing of URLs. An attacker could exploit this vulnerability by crafting a URL in a particular way. A successful exploit could allow the attacker to bypass the URL reputation filters that are configured for an affected device, which could allow malicious URLs to pass through the device.

Published 2023-01-20 07:15:17

Updated 2024-01-25 17:15:28

Source Cisco Systems, Inc.

View at NVD, CVE.org

Products affected by CVE-2023-20057

Cisco » Asyncos » Version: N/A
cpe:2.3:o:cisco:asyncos:-:*:*:*:*:*:*:*
Matching versions
When used together with: Cisco » Email Security Appliance C160 » Version: N/A
When used together with: Cisco » Email Security Appliance C170 » Version: N/A
When used together with: Cisco » Email Security Appliance C190 » Version: N/A
When used together with: Cisco » Email Security Appliance C370 » Version: N/A
When used together with: Cisco » Email Security Appliance C370d » Version: N/A
When used together with: Cisco » Email Security Appliance C380 » Version: N/A
When used together with: Cisco » Email Security Appliance C390 » Version: N/A
When used together with: Cisco » Email Security Appliance C670 » Version: N/A
When used together with: Cisco » Email Security Appliance C680 » Version: N/A
When used together with: Cisco » Email Security Appliance C690 » Version: N/A
When used together with: Cisco » Email Security Appliance C690x » Version: N/A
When used together with: Cisco » Email Security Appliance X1070 » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2023-20057

EPSS FAQ

0.11%

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

~ 45 %

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

CVSS scores for CVE-2023-20057

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.3	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N	3.9	1.4	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: Low Availability: None
N/A	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:N	2.8	N/A	Cisco Systems, Inc.
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: Required Scope: Unchanged Confidentiality: None Integrity: None Availability: None

CWE ids for CVE-2023-20057

CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.

Assigned by: nvd@nist.gov (Primary)
CWE-792 Incomplete Filtering of One or More Instances of Special Elements

The product receives data from an upstream component, but does not completely filter one or more instances of special elements before sending it to a downstream component.

Assigned by: ykramarz@cisco.com (Secondary)

References for CVE-2023-20057

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-url-bypass-WbMQqNJh

Cisco Email Security Appliance URL Filtering Bypass Vulnerability
Vendor Advisory

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Vulnerability Details : CVE-2023-20057

Products affected by CVE-2023-20057

Exploit prediction scoring system (EPSS) score for CVE-2023-20057

CVSS scores for CVE-2023-20057

CWE ids for CVE-2023-20057

References for CVE-2023-20057