Cisco Email Security Appliance URL Filtering Bypass (cisco-sa-esa-url-bypass-sGcfsDrp)

medium Nessus Plugin ID 153943

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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 URL Filtering Bypass is affected by a URL filtering bypass vulnerability. The vulnerability exists in the antispam protection mechanisms due to improper processing of URLs. An unauthenticated, remote attacker can exploit this, by crafting a URL in a particular way, to bypass the URL reputation filters. This could allow malicious URLs to pass through the device.

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 CSCvx60178

Plugin Details

Severity: Medium

ID: 153943

File Name: cisco-sa-esa-url-bypass-sGcfsDrp.nasl

Version: 1.7

Type: combined

Family: CISCO

Published: 10/8/2021

Updated: 6/20/2022

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-2021-1534

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

CPE: cpe:/a:cisco:email_security_appliance

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

Exploit Ease: No known exploits are available

Patch Publication Date: 10/6/2021

Vulnerability Publication Date: 10/6/2021

Reference Information

CVE: CVE-2021-1534

CWE: 20

CISCO-SA: cisco-sa-esa-url-bypass-sGcfsDrp

IAVA: 2021-A-0454-S

CISCO-BUG-ID: CSCvx60178

Detections

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