Cisco Email Security Appliance Content Filter Bypass Vulnerability (cisco-sa-20190417-esa-filter-bypass)

medium Nessus Plugin ID 126822

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Synopsis

The remote device is missing a vendor-supplied security patch

Description

According to its self-reported version, Cisco Email Security Appliance (ESA) is affected by following vulnerability

- A vulnerability in the email message scanning 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 input validation of the email body. An attacker could exploit this vulnerability by inserting specific character strings in the message.
A successful exploit could allow the attacker to bypass configured content filters that would normally drop the email. (CVE-2019-1831)

Please see the included Cisco BIDs and Cisco Security Advisory for more information

Solution

Upgrade to the relevant fixed version referenced in Cisco Security Advisory cisco-sa-20190417-esa-filter-bypass

Plugin Details

Severity: Medium

ID: 126822

File Name: cisco-sa-20190417-esa-filter-bypass.nasl

Version: 1.7

Type: local

Family: CISCO

Published: 7/19/2019

Updated: 6/3/2021

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N

CVSS Score Source: CVE-2019-1831

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Required KB Items: Settings/ParanoidReport, Host/AsyncOS/Cisco Email Security Appliance/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 4/17/2019

Vulnerability Publication Date: 4/17/2019

Reference Information

CVE: CVE-2019-1831

BID: 108021

CWE: 20

CISCO-SA: cisco-sa-20190417-esa-filter-bypass

IAVA: 2019-A-0243-S

CISCO-BUG-ID: CSCvo01349, CSCvo78686

Detections

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