PT-2020-1574 · Cisco · Cisco Asyncos+1

Published 2020-01-22 · Updated 2020-01-28 · CVE-2020-3134

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Name of the Vulnerable Software and Affected Versions Cisco AsyncOS Software for Cisco Email Security Appliance versions prior to 13.0

Description A vulnerability in the zip decompression engine could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The issue is due to improper validation of zip files. An attacker could exploit this by sending an email message with a crafted zip-compressed attachment, potentially triggering a restart of the content-scanning process and causing a temporary DoS condition.

Recommendations For versions prior to 13.0, update to version 13.0 or later to resolve the issue. As a temporary workaround, consider restricting the handling of zip-compressed attachments to minimize the risk of exploitation.

Fix

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2020-00615

CVE-2020-3134

Affected Products

Cisco Asyncos

Cisco Email Security Appliance

References · 4

• https://osv.dev/vulnerability/CVE-2020-3134 · Vendor Advisory
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-dos-87mBkc8n · Vendor Advisory
• https://bdu.fstec.ru/vul/2020-00615 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2020-3134 · Security Note