CVE-2020-3134

Medium

Description

A vulnerability in the zip decompression engine of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper validation of zip files. An attacker could exploit this vulnerability by sending an email message with a crafted zip-compressed attachment. A successful exploit could trigger a restart of the content-scanning process, causing a temporary DoS condition. This vulnerability affects Cisco AsyncOS Software for Cisco ESA releases earlier than 13.0.

SeverityMedium

CVSS6.5

Exploit probability—

Product

Cisco Email Security Appliance

PublishedJan 26, 2020

First seenJan 26, 2020

Weakness typeCWE-20Improper input validation

How to fix

Update

cisco email_security_appliance13.0 or later

Vendor advisories

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-dos-87mBkc8n

Affected products

Product	Affected versions	Fixed in
cisco email_security_appliance	v < 13.0	13.0

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