PT-2019-2554 · Cisco · Cisco Email Security Appliance

Published 2019-06-19 · Updated 2026-05-07 · CVE-2019-1905

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 (ESA) (affected versions not specified)

Description A vulnerability in the GZIP decompression engine could allow an unauthenticated, remote attacker to bypass configured content filters on the device. This is due to improper validation of GZIP-formatted files. An attacker could exploit this by sending a malicious file inside a crafted GZIP-compressed file, potentially allowing them to bypass 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:2019-02406

CVE-2019-1905

Affected Products

Cisco Email Security Appliance

References · 8

• https://bdu.fstec.ru/vul/2019-02406 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2019-1905 · Security Note
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190619-esa-bypass · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-1905 · Vendor Advisory
• https://tools.cisco.com/security/center/publicationListing.x?product=Cisco&last_published=2019+Jun&sort=-day_sir&limit=50#~Vulnerabilities · Note
• https://tools.cisco.com/security/center/publicationListing.x?product=Cisco&last_published=2019+Jun&sort=-day_sir&limit=50#~Vulnerabilities · Note
• https://t.me/CVEtracker/52927 · Telegram Post
• http://securityfocus.com/bid/108856 · Note