Symantec Endpoint Protection up to 12.1.6 MP4 Dec2SS memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability classified as critical has been found in Symantec Endpoint Protection up to 12.1.6 MP4 (Anti-Malware Software). Affected is some unknown functionality of the component Dec2SS. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The software performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability.

The bug was discovered 06/28/2016. The weakness was presented 06/28/2016 by Tavis Ormandy with Google as SYM16-010 as confirmed advisory (Website). The advisory is available at This vulnerability is traded as CVE-2016-2209 since 02/02/2016. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are unknown but a public exploit is available.

The exploit is shared for download at It is declared as proof-of-concept. As 0-day the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 91895 (Symantec Endpoint Protection Client 12.1.x < 12.1 RU6 MP5 Multiple Vulnerabilities (SYM16-010)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370074 (Symantec Multiple Products Decomposer Engine Multiple File Parsing Vulnerabilities (SYM16-010)).

Applying the patch 12.1 RU6 MP5 is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (91895) and Exploit-DB (40037). See 88397, 88399, 88400 and 88401 for similar entries.


  • Symantec Advanced Threat Protection
  • Symantec Critical System Protection
  • Symantec CSAPI
  • Symantec Data Center Server
  • Symantec Email Security Server .Cloud
  • Symantec Embedded Systems Critical System Protection
  • Symantec Endpoint Protection
  • Symantec Endpoint Protection for Linux
  • Symantec Endpoint Protection for Mac
  • Symantec Mail Security for Domino
  • Symantec Mail Security for Microsoft Exchange
  • Symantec Message Gateway
  • Symantec Message Gateway for Service Providers
  • Symantec Norton 360
  • Symantec Norton AntiVirus
  • Symantec Norton Security
  • Symantec Protection Engine
  • Symantec Protection for SharePoint Servers
  • Symantec Web Gateway
  • Symantec Web Security .Cloud






  • commercial

CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.5

VulDB Base Score: 8.6
VulDB Temp Score: 7.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.3
NVD Vector: 🔍



VulDB Base Score: 🔍
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Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
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Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 91895
Nessus Name: Symantec Endpoint Protection Client 12.1.x < 12.1 RU6 MP5 Multiple Vulnerabilities (SYM16-010)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 900306
OpenVAS Name: Symantec Messaging Gateway Decomposer Engine Multiple Parsing Vulnerabilities)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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


Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: 12.1 RU6 MP5
Suricata ID: 2022923
Suricata Class: 🔍
Suricata Message: 🔍


02/02/2016 🔍
06/28/2016 +147 days 🔍
06/28/2016 +0 days 🔍
06/28/2016 +0 days 🔍
06/28/2016 +0 days 🔍
06/29/2016 +1 days 🔍
06/30/2016 +1 days 🔍
06/30/2016 +0 days 🔍
06/30/2016 +0 days 🔍
08/25/2022 +2247 days 🔍



Advisory: SYM16-010
Researcher: Tavis Ormandy
Organization: Google
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-2209 (🔍)

SecurityTracker: 1036198
SecurityFocus: 91436 - Multiple Symantec Products CVE-2016-2209 Dec2SS Buffer Overflow Vulnerability

scip Labs:
See also: 🔍


Created: 06/30/2016 11:59 AM
Updated: 08/25/2022 02:28 PM
Changes: 06/30/2016 11:59 AM (89), 07/07/2019 02:36 PM (8), 08/25/2022 02:28 PM (3)
Complete: 🔍


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