VDB-93136 · CVE-2016-6356 · BID 93907

Cisco Email Security Appliance prior 9.1.1-038/9.7.2-047/10.0.0-125 Message Filter input validation

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in Cisco Email Security Appliance. Affected is an unknown function of the component Message Filter. Executing a manipulation can lead to input validation. This vulnerability is handled as CVE-2016-6356. The attack can be executed remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Cisco Email Security Appliance (Anti-Malware Software) and classified as critical. This vulnerability affects an unknown functionality of the component 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. CVE summarizes:

A vulnerability in the email message filtering feature of Cisco AsyncOS Software for Cisco Email Security Appliances could allow an unauthenticated, remote attacker to cause an affected device to stop scanning and forwarding email messages due to a denial of service (DoS) condition. Affected Products: This vulnerability affects all releases prior to the first fixed release of Cisco AsyncOS Software for Cisco Email Security Appliances, both virtual and hardware appliances, if the software is configured to apply a message filter or content filter to incoming email attachments. The vulnerability is not limited to any specific rules or actions for a message filter or content filter. More Information: CSCuz63143. Known Affected Releases: 8.5.7-042 9.7.0-125. Known Fixed Releases: 10.0.0-125 9.1.1-038 9.7.2-047.

The weakness was released 10/28/2016 with Cisco as confirmed advisory (Website). The advisory is shared for download at tools.cisco.com. This vulnerability was named CVE-2016-6356 since 07/26/2016. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 316059 (Cisco Email Security Appliance Corrupted Attachment Fields Denial of Service Vulnerability (cisco-sa-20161026-esa3)).

Upgrading to version 9.1.1-038, 9.7.2-047 or 10.0.0-125 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 93907†). Entries connected to this vulnerability are available at VDB-93139, VDB-93138, VDB-93137 and VDB-93132. VulDB is the best source for vulnerability data and more expert information about this specific topic.

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: 7.3

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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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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OpenVAS ID: 16279
OpenVAS Name: Cisco Email Security Appliance Corrupted Attachment Fields Denial of Service Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Email Security Appliance 9.1.1-038/9.7.2-047/10.0.0-125

Timelineinfo

07/26/2016 🔍
10/26/2016 +92 days 🔍
10/28/2016 +2 days 🔍
10/28/2016 +0 days 🔍
10/28/2016 +0 days 🔍
09/25/2024 +2889 days 🔍

Sourcesinfo

Vendor: cisco.com

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

CVE: CVE-2016-6356 (🔍)
GCVE (CVE): GCVE-0-2016-6356
GCVE (VulDB): GCVE-100-93136
SecurityFocus: 93907 - Cisco AsyncOS CVE-2016-6356 Remote Denial of Service Vulnerability
SecurityTracker: 1037122

See also: 🔍

Entryinfo

Created: 10/28/2016 19:46
Updated: 09/25/2024 06:55
Changes: 10/28/2016 19:46 (56), 05/19/2019 18:30 (13), 09/28/2022 15:19 (4), 09/25/2024 06:55 (16)
Complete: 🔍
Cache ID: 216::103

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