PT-2020-4621 · Cisco · Cisco Asyncos+1

Published 2020-11-04 · Updated 2024-01-25 · CVE-2020-26082

Positive Technologies (AI Summary)

CVSS v3.1

5.8

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Cisco Email Security Appliance (affected versions not specified)

Description The issue is related to the zip decompression engine of Cisco AsyncOS Software, which is used in Cisco Email Security Appliance. It is caused by improper handling of password-protected zip files, allowing an unauthenticated, remote attacker to bypass content filters configured on the device. An attacker could exploit this by sending a malicious file inside a crafted zip-compressed file to the affected device, potentially bypassing content filters that would normally drop the email.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2020-05170

CVE-2020-26082

Affected Products

Cisco Asyncos

Cisco Email Security Appliance

References · 7

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-zip-bypass-gbU4gtTg · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-26082 · Security Note
• https://bdu.fstec.ru/vul/2020-05170 · Security Note
• https://osv.dev/vulnerability/CVE-2020-26082 · Vendor Advisory
• https://t.me/cibsecurity/67809 · Telegram Post
• https://t.me/cvenotify/56167 · Telegram Post
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-zip-bypass-gbU4gtTg · Note