Detections
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Cisco Email Security Appliance DoS (cisco-sa-esa-tls-dos-xW53TBhb)

high Nessus Plugin ID 140212

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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 its transport layer security (TLS) implementation due to inefficient processing of incoming traffic. An unauthenticated, remote attacker can exploit this issue, by sending specially crafted TLS packets to an affected host, to impose a DoS condition.


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

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvu35999

See Also

http://www.nessus.org/u?5bd1c68c

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvu35999

Plugin Details

Severity: High

ID: 140212

File Name: cisco-sa-esa-tls-dos-xW53TBhb.nasl

Version: 1.11

Type: combined

Family: CISCO

Published: 9/4/2020

Updated: 8/1/2025

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-2020-3548

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: cpe:/h:o:cisco:email_security_appliance_%28esa%29

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

Exploit Ease: No known exploits are available

Patch Publication Date: 9/2/2020

Vulnerability Publication Date: 9/2/2020

Reference Information

CVE: CVE-2020-3548

CWE: 407

CISCO-SA: cisco-sa-esa-tls-dos-xW53TBhb

IAVA: 2020-A-0400-S

CISCO-BUG-ID: CSCvu35999