SB2020012708 - Multiple vulnerabilities in Cisco AsyncOS Software for Cisco Email Security Appliance
Published: January 27, 2020
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) Input validation error (CVE-ID: CVE-2020-3134)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper validation of zip files in the zip decompression engine. A remote attacker can send an email message with a crafted zip-compressed attachment and trigger a restart of the content-scanning process, causing a temporary denial of service condition.
2) Input validation error (CVE-ID: CVE-2020-3133)
The vulnerability allows a remote attacker to bypass configured filters on the target device.
The vulnerability exists due to improper validation of incoming emails. A remote attacker can send a specially crafted email message to a recipient protected by the ESA and bypass the configured content filters, which could allow malicious content to pass through the device.
3) Cross-site scripting (CVE-ID: CVE-2020-3137)
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data in the web-based management interface. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
Remediation
Install update from vendor's website.