CVE-2019-12706 Explained : Impact and Mitigation
Learn about CVE-2019-12706, a vulnerability in Cisco Email Security Appliance allowing remote attackers to bypass user filters, potentially enabling the passage of malicious content. Find mitigation steps and prevention measures here.
A security flaw in the Sender Policy Framework (SPF) feature of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) allows remote attackers to bypass user filters, potentially enabling the passage of malicious content.
Understanding CVE-2019-12706
This CVE involves a vulnerability in the SPF functionality of Cisco Email Security Appliance (ESA) that could be exploited by unauthenticated remote attackers.
What is CVE-2019-12706?
The vulnerability in the SPF feature of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) permits attackers to send personalized SPF packets to bypass user filters on affected devices.
The Impact of CVE-2019-12706
The flaw allows remote attackers to circumvent configured header filters, potentially enabling the passage of malicious content through the impacted device.
Technical Details of CVE-2019-12706
This section provides more in-depth technical insights into the vulnerability.
Vulnerability Description
The security flaw in the SPF feature of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) allows remote attackers to bypass user filters on affected devices.
Affected Systems and Versions
- Product: Cisco Email Security Appliance (ESA)
- Vendor: Cisco
- Versions: Unspecified
Exploitation Mechanism
- Attack Complexity: Low
- Attack Vector: Network
- Base Score: 6.5 (Medium)
- Confidentiality Impact: Low
- Integrity Impact: Low
- Privileges Required: None
- User Interaction: None
- Vector String: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Mitigation and Prevention
Steps to address and prevent exploitation of the vulnerability.
Immediate Steps to Take
- Apply vendor-provided patches or updates promptly.
- Monitor Cisco's security advisories for any further updates or recommendations.
Long-Term Security Practices
- Regularly update and patch all software and systems.
- Implement network segmentation and access controls to limit exposure.
- Conduct regular security assessments and audits.
Patching and Updates
- Ensure all Cisco Email Security Appliances are updated with the latest patches.