Cisco Email Security Appliance URL Filtering Bypass (cisco-sa-20191120-esa-url-bypass)

medium Nessus Plugin ID 135289

Language:

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 vulnerability in the antispam protection mechanisms of Cisco AsyncOS Software due to insufficient input validation of URLs. An unauthenticated, remote attacker can exploit this, by crafting the URL in a particular way, in order to bypass the URL reputation filters on an affected device.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvq09347

Plugin Details

Severity: Medium

ID: 135289

File Name: cisco-sa-20191120-esa-url-bypass.nasl

Version: 1.6

Type: local

Family: CISCO

Published: 4/10/2020

Updated: 6/3/2021

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-2019-15988

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

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

Exploit Ease: No known exploits are available

Patch Publication Date: 11/20/2019

Vulnerability Publication Date: 11/20/2019

Reference Information

CVE: CVE-2019-15988

CWE: 20

CISCO-SA: cisco-sa-20191120-esa-url-bypass

IAVA: 2019-A-0368-S

CISCO-BUG-ID: CSCvq09347

Detections

Analytics