Symantec Messaging Gateway up to 10.6.5 XML Parser xml external entity reference

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability was found in Symantec Messaging Gateway up to 10.6.5. It has been rated as critical. Affected by this issue is some unknown functionality of the component XML Parser. Performing a manipulation results in xml external entity reference. This vulnerability is reported as CVE-2018-12243. The attacker must have access to the local network to execute the attack. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, was found in Symantec Messaging Gateway up to 10.6.5. This affects an unknown function of the component XML Parser. The manipulation with an unknown input leads to a xml external entity reference vulnerability. CWE is classifying the issue as CWE-611. The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The Symantec Messaging Gateway product prior to 10.6.6 may be susceptible to a XML external entity (XXE) exploit, which is a type of issue where XML input containing a reference to an external entity is processed by a weakly configured XML parser. The attack uses file URI schemes or relative paths in the system identifier to access files that should not normally be accessible.

The bug was discovered 09/12/2018. The weakness was disclosed 09/19/2018 by Alex (Website). The advisory is shared at support.symantec.com. This vulnerability is uniquely identified as CVE-2018-12243 since 06/12/2018. The exploitability is told to be easy. The attack needs to approached within the local network. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 117614 (Symantec Messaging Gateway 10.x < 10.6.6 Multiple Vulnerabilities (SYMSA1461)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CGI abuses and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 13317 (Symantec Messaging Gateway Multiple Vulnerabilities (SYMSA1461)).

Upgrading to version 10.6.6 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (117614) and SecurityFocus (BID 105330†). The entry VDB-124256 is pretty similar. 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: 7.6
VulDB Meta Temp Score: 7.4

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Xml external entity reference
CWE: CWE-611 / CWE-610
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 117614
Nessus Name: Symantec Messaging Gateway 10.x < 10.6.6 Multiple Vulnerabilities (SYMSA1461)
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: 🔍

Upgrade: Messaging Gateway 10.6.6

Timelineinfo

06/12/2018 🔍
09/12/2018 +92 days 🔍
09/12/2018 +0 days 🔍
09/19/2018 +6 days 🔍
09/19/2018 +0 days 🔍
09/19/2018 +0 days 🔍
09/20/2018 +1 days 🔍
09/20/2018 +0 days 🔍
03/25/2020 +552 days 🔍

Sourcesinfo

Vendor: symantec.com

Advisory: support.symantec.com
Researcher: Alex
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-12243 (🔍)
GCVE (CVE): GCVE-0-2018-12243
GCVE (VulDB): GCVE-100-124257
SecurityFocus: 105330 - Symantec Messaging Gateway CVE-2018-12243 XML External Entity Injection Vulnerability

See also: 🔍

Entryinfo

Created: 09/20/2018 08:16
Updated: 03/25/2020 11:36
Changes: 09/20/2018 08:16 (69), 03/25/2020 11:36 (6)
Complete: 🔍
Cache ID: 216::103

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

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