Detections
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Cisco Email Security Appliance DoS (cisco-sa-20200219-esa-dos)

high Nessus Plugin ID 134107

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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 a denial of service (DoS) vulnerability in the email message filtering feature due to improper handling of email messages that contain large attachments. An unauthenticated, remote attacker can exploit this, by sending a malicious email message, in order to increase CPU utilization to 100 percent and cause a permanent DoS condition, requiring manual intervention to recover the ESA.

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

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvq03793

See Also

http://www.nessus.org/u?9e2c1c11

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvq03793

Plugin Details

Severity: High

ID: 134107

File Name: cisco-sa-20200219-esa-dos.nasl

Version: 1.10

Type: combined

Family: CISCO

Published: 2/28/2020

Updated: 10/19/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2019-1947

CVSS v3

Risk Factor: High

Base Score: 8.6

Temporal Score: 7.5

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

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

Vulnerability Information

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

Exploit Ease: No known exploits are available

Patch Publication Date: 2/19/2020

Vulnerability Publication Date: 2/19/2020

Reference Information

CVE: CVE-2019-1947

CISCO-SA: cisco-sa-20200219-esa-dos

IAVA: 2020-A-0079-S

CISCO-BUG-ID: CSCvq03793