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Cisco Email Security Appliance Header Injection Vulnerability

high Nessus Plugin ID 128546

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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 security bypass vulnerability. A flaw exists with the Sender Policy Framework (SPF) due to improper validation of SPF messages. An unauthenticated, remote attacker can exploit this, via a specially crafted SPF packet, to bypass header filters. 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 CSCvp27126

See Also

http://www.nessus.org/u?0126aed6

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvp27126

Plugin Details

Severity: High

ID: 128546

File Name: cisco-sa-20190807-esm-inject.nasl

Version: 1.6

Type: local

Family: CISCO

Published: 9/6/2019

Updated: 12/20/2019

Configuration: Enable paranoid mode

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 Score Source: CVE-2019-1955

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

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

Exploit Ease: No known exploits are available

Patch Publication Date: 8/7/2019

Vulnerability Publication Date: 8/8/2019

Reference Information

CVE: CVE-2019-1955

CWE: 20

CISCO-SA: cisco-sa-20190807-esm-inject

CISCO-BUG-ID: CSCvp27126