Cisco AsyncOS for Email Security Appliance Attachment MIME Header Handling Filter Bypass (cisco-sa-20170607-esa1)

high Nessus Plugin ID 101264

Language:

Synopsis

The remote security appliance is missing a vendor-supplied security patch.

Description

According to its self-reported version, the Cisco AsyncOS running on the remote Cisco Email Security (ESA) appliance is affected by a security bypass vulnerability in the email message scanning functionality due to improper validation of emails with attachments and a modified Multipurpose Internet Mail Extensions (MIME) header. An unauthenticated, remote attacker can exploit this, via a malformed email message with an attachment, to bypass configured security and message filters.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvd34632.

Plugin Details

Severity: High

ID: 101264

File Name: cisco-sa-20170607-esa1.nasl

Version: 1.4

Type: combined

Family: CISCO

Published: 7/6/2017

Updated: 1/18/2019

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

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 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:H/A:N

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

Vulnerability Information

CPE: cpe:/h:cisco:email_security_appliance, cpe:/o:cisco:email_security_appliance_firmware

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

Exploit Ease: No known exploits are available

Patch Publication Date: 6/7/2017

Vulnerability Publication Date: 6/7/2017

Reference Information

CVE: CVE-2017-6671

BID: 98969

CISCO-SA: cisco-sa-20170607-esa1

CISCO-BUG-ID: CSCvd34632

Detections

Analytics