PT-2019-4321 · Cisco · Cisco Email Security Appliance+1

Published 2019-11-20 · Updated 2020-10-16 · CVE-2019-15971

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 MP3 detection 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 issue is due to improper validation of certain MP3 file types. An attacker could exploit this by sending a crafted MP3 file through the targeted device, 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.

Insufficient Verification of Data Authenticity

RCE

Weakness Enumeration

CWE-345

CWE-20

Related Identifiers

BDU:2020-00036

CVE-2019-15971

Affected Products

Cisco Asyncos

Cisco Email Security Appliance

References · 4

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191120-esa-mp3-bypass · Vendor Advisory
• https://bdu.fstec.ru/vul/2020-00036 · Security Note
• https://osv.dev/vulnerability/CVE-2019-15971 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-15971 · Security Note