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Cisco Email Security Appliance GZIP Content Filter Bypass Vulnerability

cisco-sa-20190619-esa-bypass · Medium · Published · Updated

A vulnerability in the GZIP decompression engine of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to bypass configured content filters on the device. The vulnerability is due to improper validation of GZIP-formatted files. An attacker could exploit this vulnerability by sending a malicious file inside a crafted GZIP-compressed file. A successful exploit could allow the attacker to bypass configured content filters that would normally drop the email. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190619-esa-bypass

Cisco advisory ·CSAF JSON

Workarounds

There are no workarounds that address this vulnerability.

CVEsCVE-2019-1905
Cisco Bug IDsCSCvo82840
CVSS ScoreBase 5.8
Base 5.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N/E:X/RL:X/RC:X
Product Names From Source
Cisco Email Security Appliance (ESA), Cisco Secure Email

Related Products

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Cisco Nexus Dashboard CVE-2019-1905 Cisco OpenVuln
Cisco Secure Email CVE-2019-1905 Cisco OpenVuln
Cisco Email Security Appliance (ESA) CVE-2019-1905 Cisco OpenVuln