Cisco Email Security Appliance Email Message Filter input validation

CVSS Meta Temp Score
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CTI Interest Score
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7.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Cisco Email Security Appliance. It has been classified as problematic. This issue affects some unknown processing of the component Email Message Filter. This manipulation causes input validation. This vulnerability is handled as CVE-2018-15460. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in Cisco Email Security Appliance (Anti-Malware Software) (unknown version) and classified as problematic. Affected by this vulnerability is an unknown code block of the component Email Message Filter. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect availability. The summary by CVE is:

A vulnerability in the email message filtering feature of Cisco AsyncOS Software for Cisco Email Security Appliances (ESA) could allow an unauthenticated, remote attacker to cause the CPU utilization to increase to 100 percent, causing a denial of service (DoS) condition on an affected device. The vulnerability is due to improper filtering of email messages that contain references to whitelisted URLs. An attacker could exploit this vulnerability by sending a malicious email message that contains a large number of whitelisted URLs. A successful exploit could allow the attacker to cause a sustained DoS condition that could force the affected device to stop scanning and forwarding email messages.

The bug was discovered 01/09/2019. The weakness was released 01/10/2019 with Cisco as cisco-sa-20190109-esa-url-dos as confirmed advisory (Website). The advisory is shared at tools.cisco.com. This vulnerability is known as CVE-2018-15460 since 08/17/2018. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 121248 (Cisco Email Security Appliance Multiple DoS Vulnerabilities (cisco-sa-20190109-esa-dos / cisco-sa-20190109-esa-url-dos)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO and running in the context c. The commercial vulnerability scanner Qualys is able to test this issue with plugin 316364 (Cisco Email Security Appliance URL Filtering Denial of Service Vulnerability(cisco-sa-20190109-esa-url-dos)).

Upgrading eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (121248) and SecurityFocus (BID 106507†). Entry connected to this vulnerability is available at VDB-128997. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.6
NVD Vector: 🔍

CNA Base Score: 8.6
CNA Vector (Cisco Systems, Inc.): 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 121248
Nessus Name: Cisco Email Security Appliance Multiple DoS Vulnerabilities (cisco-sa-20190109-esa-dos / cisco-sa-20190109-esa-url-dos)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/17/2018 🔍
01/09/2019 +145 days 🔍
01/09/2019 +0 days 🔍
01/09/2019 +0 days 🔍
01/10/2019 +1 days 🔍
01/10/2019 +0 days 🔍
01/11/2019 +1 days 🔍
01/18/2019 +7 days 🔍
06/26/2023 +1620 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20190109-esa-url-dos
Organization: Cisco
Status: Confirmed

CVE: CVE-2018-15460 (🔍)
GCVE (CVE): GCVE-0-2018-15460
GCVE (VulDB): GCVE-100-129001
SecurityFocus: 106507 - Cisco Email Security Appliance CVE-2018-15460 Remote Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 01/11/2019 07:43
Updated: 06/26/2023 09:19
Changes: 01/11/2019 07:43 (69), 04/28/2020 14:40 (6), 06/26/2023 09:19 (14)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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