Cisco Email Security Appliance Advanced Malware Protection Email Attachment input validation

Summaryinfo

A vulnerability labeled as problematic has been found in Cisco Email Security Appliance and Content Security Management Appliance. Affected by this vulnerability is an unknown functionality of the component Advanced Malware Protection. The manipulation as part of Email Attachment results in input validation. This vulnerability is identified as CVE-2019-1983. The attack can be executed remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic has been found in Cisco Email Security Appliance and Content Security Management Appliance (Anti-Malware Software) (the affected version unknown). Affected is an unknown part of the component Advanced Malware Protection. The manipulation as part of a Email Attachment leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on availability. CVE summarizes:

A vulnerability in the email message filtering feature of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) and Cisco Content Security Management Appliance (SMA) could allow an unauthenticated, remote attacker to cause repeated crashes in some internal processes that are running on the affected devices, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient input validation of email attachments. An attacker could exploit this vulnerability by sending an email message with a crafted attachment through an affected device. A successful exploit could allow the attacker to cause specific processes to crash repeatedly, resulting in the complete unavailability of both the Cisco Advanced Malware Protection (AMP) and message tracking features and in severe performance degradation while processing email. After the affected processes restart, the software resumes filtering for the same attachment, causing the affected processes to crash and restart again. A successful exploit could also allow the attacker to cause a repeated DoS condition. Manual intervention may be required to recover from this situation.

The weakness was released 09/23/2020 as cisco-sa-20200219-esa-sma-dos as confirmed advisory (Website). The advisory is available at tools.cisco.com. This vulnerability is traded as CVE-2019-1983 since 12/06/2018. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 09/23/2020).

Upgrading eliminates this vulnerability.

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Productinfo

Type

• Anti-Malware Software

Vendor

• Cisco

Name

• Content Security Management Appliance
• Email Security Appliance

License

• commercial

Website

• Vendor: https://www.cisco.com/

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