CVE-2018-0447: Cisco Email Security Appliance URL Filtering Bypass Vulnerability
First published: Fri Oct 05 2018(Updated: )
A vulnerability in the anti-spam protection mechanisms of Cisco AsyncOS Software for the Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to bypass certain content filters on an affected device. The vulnerability is due to incomplete input and validation checking mechanisms for certain Sender Policy Framework (SPF) messages that are sent to an affected device. An attacker could exploit this vulnerability by sending a customized SPF packet to an affected device. If successful, an exploit could allow the attacker to bypass the URL filters that are configured for the affected device, which could allow malicious URLs to pass through the device.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Email Security Appliance |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
Frequently Asked Questions
What is CVE-2018-0447?
CVE-2018-0447 is a vulnerability in the anti-spam protection mechanisms of Cisco AsyncOS Software for the Cisco Email Security Appliance (ESA).
How severe is CVE-2018-0447?
CVE-2018-0447 has a severity score of 5.3, which is considered medium.
What is the impact of CVE-2018-0447?
CVE-2018-0447 allows an unauthenticated, remote attacker to bypass certain content filters on an affected device.
How can I fix CVE-2018-0447?
To fix CVE-2018-0447, Cisco recommends applying the necessary updates or patches provided by the vendor.
Where can I find more information about CVE-2018-0447?
You can find more information about CVE-2018-0447 on the Cisco Security Advisory page or security-focused websites such as SecurityFocus and SecurityTracker.
- collector/nvd-index
- agent/type
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/references
- agent/last-modified-date
- agent/title
- agent/author
- agent/weakness
- agent/severity
- agent/event
- agent/first-publish-date
- agent/description
- agent/tags
- vendor/cisco
- canonical/cisco email security appliance