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Rewterz Threat Advisory – CVE-2021-1223 – Multiple Cisco Products Snort HTTP Detection Engine File Policy Bypass Vulnerability

Severity

Medium

Analysis Summary

CVE-2021-1223

Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured file policy for HTTP. An attacker could exploit this vulnerability by sending crafted HTTP packets through an affected device. A successful exploit could allow the attacker to bypass configured file policy for HTTP packets and deliver a malicious payload.

Impact

Unauthorized Access

Affected Vendors

Cisco

Affected Products

  • Cisco 3000 Series Industrial Security Appliances
  • Cisco Firepower Threat Defense (FTD) Software
  • 1000 Series Integrated Services Routers (ISRs)
  • 4000 Series Integrated Services Router(ISRs)
  • Cloud Services Router 1000V Series
  • Integrated Service Virtual Router(ISRs)

Remediation

Refer to cisco advisory for the complete list of affected product and their respective patches.

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort-filepolbypass-67DEwMe2

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