CVE-2019-12706 - Cisco Email Security Appliance Filter Bypass Vulnerability

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HIGH

Cisco Email Security Appliance Filter Bypass Vulnerability

Published Oct 2, 2019

7.5

HIGH

CVSS 3.1

EPSS 1.31%

Description

A vulnerability in the Sender Policy Framework (SPF) functionality of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to bypass the configured user filters on an affected device. The vulnerability exists because the affected software insufficiently validates certain incoming SPF messages. An attacker could exploit this vulnerability by sending a custom SPF packet to an affected device. A successful exploit could allow the attacker to bypass the configured header filters, which could allow malicious content to pass through the device.

Affected products

Vendor Cisco Product Cisco Email Security Appliance (ESA) Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Cisco

Cisco Email Security Appliance (ESA)

n/a

Version	Status	Constraints
unspecified	affected	-

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-20

Improper Input Validation

References (2)

https://euvd.enisa.europa.eu/vulnerability/EUVD-2019-4297
Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191002-esa-bypass
vendor-advisoryx_refsource_CISCOVendor Advisory

Link	Providers	Tags
https://euvd.enisa.europa.eu/vulnerability/EUVD-2019-4297		Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191002-esa-bypass		vendor-advisoryx_refsource_CISCOVendor Advisory