SB2019100220 - Filter Bypass in Cisco AsyncOS for Cisco Email Security Appliance
Published: October 2, 2019 Updated: February 20, 2020
Security Bulletin ID
SB2019100220
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Input validation error (CVE-ID: CVE-2019-12706)
The vulnerability allows a remote attacker to bypass the configured user filters on an affected device.
The vulnerability exists within the Sender Policy Framework (SPF) functionality due to the affected software insufficiently validates certain incoming SPF messages. A remote attacker can send a custom SPF packet to an affected device and bypass the configured header filters, which could allow malicious content to pass through the device.
Remediation
Install update from vendor's website.