Cisco Email Security Appliance MIME Scanner Email Attachment 7pk security

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Cisco Email Security Appliance. This vulnerability affects unknown code of the component MIME Scanner. Executing a manipulation as part of Email Attachment can lead to 7pk security. This vulnerability is registered as CVE-2017-12353. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical was found in Cisco Email Security Appliance (Anti-Malware Software) (unknown version). This vulnerability affects an unknown code block of the component MIME Scanner. The manipulation as part of a Email Attachment leads to a 7pk security vulnerability. The CWE definition for the vulnerability is CWE-254. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A vulnerability in the Multipurpose Internet Mail Extensions (MIME) scanner of Cisco AsyncOS Software for Cisco Email Security Appliances (ESA) could allow an unauthenticated, remote attacker to bypass configured user filters on the device. The vulnerability is due to improper error handling of a malformed MIME header in an email attachment. An attacker could exploit this vulnerability by sending an email with a crafted MIME attachment. For example, a successful exploit could allow the attacker to bypass configured user filters to drop the email. The malformed MIME headers may not be RFC compliant. However, some mail clients could still allow users to access the attachment, which may not have been properly filtered by the device. Cisco Bug IDs: CSCvf44666.

The bug was discovered 11/29/2017. The weakness was published 11/30/2017 as cisco-sa-20171129-esa as confirmed advisory (Website). The advisory is shared for download at tools.cisco.com. This vulnerability was named CVE-2017-12353 since 08/03/2017. 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 MITRE ATT&CK project declares the attack technique as T1211.

The vulnerability scanner Nessus provides a plugin with the ID 105257 (Cisco Email Security Appliance Filter Bypass Vulnerability), 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 316254 (Cisco Email Security Appliance Header Bypass Vulnerability(cisco-sa-20171129-esa)).

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 (105257) and SecurityFocus (BID 102002†). 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: 6.6
VulDB Meta Temp Score: 6.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: 7pk security
CWE: CWE-254
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: 105257
Nessus Name: Cisco Email Security Appliance Filter Bypass Vulnerability
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

08/03/2017 🔍
11/29/2017 +118 days 🔍
11/29/2017 +0 days 🔍
11/29/2017 +0 days 🔍
11/30/2017 +1 days 🔍
11/30/2017 +0 days 🔍
11/30/2017 +0 days 🔍
12/14/2017 +14 days 🔍
01/25/2021 +1138 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-20171129-esa
Researcher: Mai Ngoc Duong.
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-12353 (🔍)
GCVE (CVE): GCVE-0-2017-12353
GCVE (VulDB): GCVE-100-110080
SecurityFocus: 102002 - Cisco Email Security Appliance CVE-2017-12353 Remote Security Bypass Vulnerability
SecurityTracker: 1039917

Entryinfo

Created: 11/30/2017 14:47
Updated: 01/25/2021 13:12
Changes: 11/30/2017 14:47 (70), 12/12/2019 10:04 (6), 01/25/2021 13:10 (2), 01/25/2021 13:12 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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