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Rewterz Threat Advisory – CVE-2023-20057 – Cisco Email Security Appliance Vulnerability

Severity

Medium

Analysis Summary

CVE-2023-20057 

Cisco Email Security Appliance could allow a remote attacker to bypass security restrictions, caused by improper processing of URLs. By crafting a URL in a particular way, an attacker could exploit this vulnerability to bypass the URL reputation filters that are configured for an affected device, which could allow malicious URLs to pass through the device.

Impact

  • Security Bypass

Indicators Of Compromise

CVE

  • CVE-2023-20057

Affected Vendors

Cisco

Affected Products

  • Cisco AsyncOS Software for Email Security Appliances (ESA)

Remediation

Refer to Cisco Security Advisory for patch, upgrade or suggested workaround information. 

Cisco Security Advisory