SB2018090716 - Security restrictions bypass in Cisco Email Security Appliance
Published: September 7, 2018
Security Bulletin ID
SB2018090716
Severity
Low
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) Improper input validation (CVE-ID: CVE-2018-0447)
The vulnerability allows a remote unauthenticated attacker to bypass security restrictions on the target system.
The vulnerability exists in the anti-spam protection mechanisms of Cisco AsyncOS Software for the Cisco Email Security Appliance (ESA) due to incomplete input and validation checking mechanisms for certain Sender Policy Framework (SPF) messages that are sent to an affected device. A remote attacker can send a customized SPF packet, bypass the URL filters that are configured and pass through the device.
Remediation
Install update from vendor's website.