Cisco Email Security Appliance up to 9.7.1-066/9.7.0-125/10.0.0-082 Email Filter Detection input validation

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Cisco Email Security Appliance up to 9.7.1-066/9.7.0-125/10.0.0-082. The affected element is an unknown function of the component Email Filter. The manipulation leads to input validation (Detection). This vulnerability is documented as CVE-2016-6463. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco Email Security Appliance up to 9.7.1-066/9.7.0-125/10.0.0-082 (Anti-Malware Software). It has been rated as critical. This issue affects an unknown code of the component Email Filter. The manipulation with an unknown input leads to a input validation vulnerability (Detection). Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A vulnerability in the email filtering functionality of Cisco AsyncOS Software for Cisco Email Security Appliances could allow an unauthenticated, remote attacker to bypass Advanced Malware Protection (AMP) filters that are configured for an affected device. This vulnerability affects all releases prior to the first fixed release of Cisco AsyncOS Software for both virtual and hardware versions of Cisco Email Security Appliances, if the AMP feature is configured to scan incoming email attachments. More Information: CSCuz85823. Known Affected Releases: 10.0.0-082 9.7.0-125 9.7.1-066. Known Fixed Releases: 10.0.0-203 9.7.2-131.

The bug was discovered 11/16/2016. The weakness was released 11/19/2016 with Cisco as confirmed advisory (Website). It is possible to read the advisory at tools.cisco.com. The identification of this vulnerability is CVE-2016-6463 since 07/26/2016. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 95479 (Cisco AsyncOS for Email Security Appliances MIME Header Processing Filter Bypass (cisco-sa-20161116-esa1 / cisco-sa-20161116-esa2)), 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 l.

Upgrading to version 9.7.2-131 or 10.0.0-203 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 (95479) and SecurityFocus (BID 94363†). Entry connected to this vulnerability is available at VDB-93670. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

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

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Name: Detection
Class: Input validation / Detection
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: 95479
Nessus Name: Cisco AsyncOS for Email Security Appliances MIME Header Processing Filter Bypass (cisco-sa-20161116-esa1 / cisco-sa-20161116-esa2)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 61872
OpenVAS Name: Cisco Email Security Appliance MIME Header Processing Filter Bypass Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Email Security Appliance 9.7.2-131/10.0.0-203

Timelineinfo

07/26/2016 🔍
11/16/2016 +113 days 🔍
11/16/2016 +0 days 🔍
11/16/2016 +0 days 🔍
11/18/2016 +2 days 🔍
11/19/2016 +1 days 🔍
11/19/2016 +0 days 🔍
12/02/2016 +13 days 🔍
06/03/2019 +913 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: tools.cisco.com
Organization: Cisco
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-6463 (🔍)
GCVE (CVE): GCVE-0-2016-6463
GCVE (VulDB): GCVE-100-93671
SecurityFocus: 94363 - Cisco AsyncOS CVE-2016-6463 Remote Security Bypass Vulnerability

See also: 🔍

Entryinfo

Created: 11/19/2016 09:03
Updated: 06/03/2019 10:17
Changes: 11/19/2016 09:03 (64), 06/03/2019 10:17 (16)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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