Cisco Email Security Appliance up to 9.7.1-066/10.0.0-125 Content Filter input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Cisco Email Security Appliance up to 9.7.1-066/10.0.0-125. It has been rated as critical. This affects an unknown part of the component Content Filter. This manipulation causes input validation. This vulnerability is tracked as CVE-2016-6458. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in Cisco Email Security Appliance up to 9.7.1-066/10.0.0-125 (Anti-Malware Software) and classified as critical. Affected by this vulnerability is an unknown function of the component Content 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 confidentiality, integrity, and availability. The summary by CVE is:

A vulnerability in the content filtering functionality of Cisco AsyncOS Software for Cisco Email Security Appliances could allow an unauthenticated, remote attacker to bypass content filters configured on an affected device. Email that should have been filtered could instead be forwarded by the device. 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 use a content filter for email attachments that are protected or encrypted. More Information: CSCva52546. Known Affected Releases: 10.0.0-125 9.7.1-066.

The bug was discovered 11/02/2016. The weakness was disclosed 11/19/2016 with Cisco as CSCva52546 as confirmed advisory (Website). It is possible to read the advisory at tools.cisco.com. This vulnerability is known as CVE-2016-6458 since 07/26/2016. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 16 days. During that time the estimated underground price was around $25k-$100k.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 94074†). The entries VDB-93671 and VDB-93670 are pretty similar. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

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

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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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OpenVAS ID: 864966
OpenVAS Name: Cisco Email Security Appliance RAR File Attachment Scanner Bypass Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

07/26/2016 🔍
11/02/2016 +99 days 🔍
11/02/2016 +0 days 🔍
11/18/2016 +16 days 🔍
11/19/2016 +1 days 🔍
11/19/2016 +0 days 🔍
10/04/2022 +2145 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: CSCva52546
Organization: Cisco
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-6458 (🔍)
GCVE (CVE): GCVE-0-2016-6458
GCVE (VulDB): GCVE-100-93667
SecurityFocus: 94074 - Cisco AsyncOS CVE-2016-6458 Remote Security Bypass Vulnerability
SecurityTracker: 1037182

See also: 🔍

Entryinfo

Created: 11/19/2016 09:01
Updated: 10/04/2022 09:06
Changes: 11/19/2016 09:01 (58), 06/03/2019 09:59 (14), 10/04/2022 09:06 (3)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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