Symantec Security ResponseSMNTC-1371Symantec Decomposer Engine Multiple Parsing Vulnerabilities
0.743 High
EPSS
Percentile
98.2%
SUMMARY
Symantec is aware of buffer overflow and memory corruption findings in the AntiVirus Decomposer engine used in various configurations by multiple Symantec products.
FAQ on Impact to Symantec Products:
<https://support.symantec.com/en_US/article.INFO3807.html>
AFFECTED PRODUCTS
Affected Enterprise Products
Product
|
Version
|
Solution(s)
—|—|—
Advanced Threat Protection (ATP)
| 2.0.3 and prior |
Updated via definition updates
Symantec Data Center Security:Server (SDCS:S)
|
6.0
6.0MP1
6.5
6.5MP1
6.6
6.6MP1
|
Updated via definition updates
Symantec Web Security .Cloud
|
|
Updated via hosted software update, customer interface not required
Email Security Server .Cloud (ESS)
| |
Updated via hosted software update, customer interface not required
Symantec Web Gateway
| |
Updated via definition updates
Symantec Endpoint Protection (SEP)
|
12.1.6 MP4 and prior
|
Update to SEP 12.1 RU6 MP5
<https://support.symantec.com/en_US/article.TECH103088.html>
Symantec Endpoint Protection for Mac (SEP for Mac)
|
12.1.6 MP4 and prior
|
Updated via definition updates
Symantec Endpoint Protection for Linux (SEP for Linux)
|
12.1.6 MP4 and prior
|
Update to SEP for Linux
12.1 RU6 MP5
<https://support.symantec.com/en_US/article.TECH103088.html>
Symantec End Point Protection, Small Business Enterprise (SEP SBE) Desktop and Laptop (Hosted)
|
Cloud Agent: 2.03.71.2618 and prior
Protection Agent: NIS-22.5.4 and prior
|
Cloud Agent: 3.00.00.2701
Protection Agent: Automatic software update to NIS-22.6.4 available (Follow instructions in this support article)
SEP SBE for Server
|
Cloud Agent: 2.03.71.2618 and prior
Protection Agent: SEP-12.1.4013.4013 and prior
|
Cloud Agent: 3.00.00.2701
Protection Agent: Software update to SEP-12.1.7004.6500 available (Follow instructions in this support article to complete the update)
SEP SBE for Mac
|
Protection Updates prior to July 13, 2016
|
Updated via definition updates July 13, 2016 or later
Symantec Endpoint Protection Small Business Edition 12.1 (On-Premises) End of Life product
|
12.1.5 and prior
|
Follow instructions in this support article
Symantec Protection Engine (SPE)
|
7.0.5 and prior
|
Update to SPE 7.0.5 HF01
For more details please refer the KB link:
<https://support.symantec.com/en_US/article.INFO3791.html>
7.5.4 and prior
|
SPE 7.5.4 (AWS platform) should update to SPE 7.5.4 HF01
SPE 7.5.3 and prior should Update to SPE 7.5.3 HF03
For more details please refer the KB link:
<https://support.symantec.com/en_US/article.INFO3791.html>
7.8.0
|
Update to SPE 7.8.0 HF01
For more details please refer the KB link:
<https://support.symantec.com/en_US/article.INFO3791.html>
Symantec Protection for SharePoint Servers (SPSS)
|
6.03 to 6.05
|
Update to Hotfix:
SPSS_6.0.3_To_6.0.5_HF_1.5
For more details please refer the KB link:
<https://support.symantec.com/en_US/article.INFO3795.html>
6.0.6 and prior
|
Update to Hotfix:
SPSS_6.0.6_HF_1.6
For more details please refer the KB link:
<https://support.symantec.com/en_US/article.INFO3795.html>
Symantec Mail Security for Microsoft Exchange (SMSMSE)
|
6.5.8
|
Update to Hotfix:
SMSMSE_6.5.8_3968140_HF1.3
For more details please refer the KB link:
<https://support.symantec.com/en_US/article.INFO3794.html>
7.0.4 and prior
|
Update to Hotfix:
SMSMSE_7.0_3966002_HF1.1
For more details please refer the KB link:
<https://support.symantec.com/en_US/article.INFO3794.html>
7.5.4 and prior
|
Update to Hotfix:
SMSMSE_7.5_3966008_VHF1.2
For more details please refer the KB link:
<https://support.symantec.com/en_US/article.INFO3794.html>
Symantec Mail Security for Domino (SMSDOM)
|
8.0.9 and prior
|
Update to Hotfix:
SMSDOM_8.0.9_HF1.1
For more details please refer the KB link:
<https://support.symantec.com/en_US/article.INFO3793.html>
8.1.3 and prior
|
Update to Hotfix:
SMSDOM_8.1.3_HF1.2
For more details please refer the KB link:
<https://support.symantec.com/en_US/article.INFO3793.html>
CSAPI
|
10.0.4 and prior
|
Update to CSAPI 10.0.4 HF01
Symantec Message Gateway (SMG)
|
SMG 10.6.1-3 and prior
|
Update to SMG 10.6.1-4
Symantec Message Gateway for Service Providers (SMG-SP)
|
10.6
|
SMG-SP 10.6, patch 253
10.5
|
SMG-SP 10.5, patch 254
Affected Norton Products
Norton Product Family
|
All Prior to NGC 22.7
|
Updated through LiveUpdateTM
—|—|—
Norton AntiVirus
Norton Security
Norton Security with Backup
Norton Internet Security
Norton 360
Norton Security for Mac
|
All Prior to 13.0.2
|
Updated through LiveUpdateTM
Norton Power Eraser (NPE)
|
All Prior to 5.1
|
Updated through LiveUpdateTM
Norton Bootable Removal Tool (NBRT)
|
All Prior to 2016.1
|
New Release available on Download
ISSUES
Severity (CVSS v2 and CVSS v3)
CVSS
Base Score
|
CVSS Vector
—|—
RAR decompression memory access violation - High
v2 7.8
|
AV:N/AC:L/Au:N/C:N/I:N/A:C
v3 7.5
|
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Dec2SS buffer overflow - High
v2 9.0
|
AV:N/AC:L/Au:N/C:P/I:P/A:C
v3 8.6
|
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Dec2LHA buffer overflow - High
v2 9.0
|
AV:N/AC:L/Au:N/C:P/I:P/A:C
v3 8.6
|
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
CAB decompression memory corruption - High
v2 7.8
|
AV:N/AC:L/Au:N/C:N/I:N/A:C
v3 7.5
|
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
MIME message modification memory corruption - High
v2 7.8
|
AV:N/AC:L/Au:N/C:N/I:N/A:C
v3 7.5
|
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
TNEF integer overflow - Low
0.0
|
AV:N/AC:L/Au:N/C:N/I:N/A:N
ZIP decompression memory access violation - High
v2 7.8
|
AV:N/AC:L/Au:N/C:N/I:N/A:C
v3 7.5
|
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVE
|
BID
|
Description
—|—|—
CVE-2016-2207
|
91434
|
RAR decompression memory access violation
CVE-2016-2209
|
91436
|
Dec2SS buffer overflow
CVE-2016-2210
|
91437
|
Dec2LHA buffer overflow
CVE-2016-2211
|
91438
|
CAB decompression memory corruption
CVE-2016-3644
|
91431
|
MIME message modification memory corruption
CVE-2016-3645
|
91439
|
TNEF integer overflow
CVE-2016 -3646
|
91435
|
ZIP decompression memory access violation
MITIGATION
Details
Parsing of maliciously-formatted container files may cause memory corruption, integer overflow or buffer overflow in Symantecs Decomposer engine. Successful exploitation of these vulnerabilities typically results in an application-level denial of service but could result in arbitrary code execution. An attacker could potentially run arbitrary code by sending a specially crafted file to a user.
In the TNEF unpacker, the overflow does not result in any detrimental actions due to underlying code. However this was an exposure due to improper implementation that could potentially be leveraged further, at some point, by a malicious individual. As such, it also was addressed in the engine update.
Symantec Response
Symantec has verified these issues and addressed them in product updates as identified in the solution portion of the affected products matrix above. We have also added additional checks to our Secure Development LifeCycle to mitigate similar issues in future.
Symantec is not aware of these vulnerabilities being exploited in the wild.
To fully mitigate the identified vulnerabilities, Symantec recommends applying the required patches to the affected products as soon as possible. This is the only means to ensure that installed products cannot be exploited. Symantec has released the following list of AV signatures in an effort to block/detect attempts at exploitation.
Vulnerabilities
|
Signatures
|
LiveUpdate rev.
—|—|—
RAR decompression memory access violation
|
EXP.CVE-2016-2207
|
20160628.037
Dec2SS buffer overflow
|
EXP.CVE-2016-2209
|
20160628.037
Dec2LHA buffer overflow
|
EXP.CVE-2016-2210
|
20160628.037
CAB decompression memory corruption
|
EXP.CVE-2016-2211
|
20160628.037
MIME message modification memory corruption
|
EXP.CVE-2016-3644
|
20160628.037
TNEF integer overflow
|
EXP.CVE-2016-3645
|
20160628.037
ZIP decompression memory access violation
|
EXP.CVE-2016-3646
|
20160628.037
Update Information
All Norton products have been updated through LiveUpdateTM. Customers of Symantec Enterprise products should check the chart below to determine which products have been updated automatically and which require product updates.
Identifying Product Update:
Product
|
Identifying Product Update
—|—
Advanced Threat Protection (ATP)
|
For an appliance which role is Network Scanner, ensure Latest Definition Updates Applied
Login to ATP web ui > Setting > Appliance > choose appliance which has ‘Scanner’ role
- ‘SCANNING’ field is shown as ‘Enabled’
- ‘AV ENGINE’ field is observed with a definition revision number 20160628.037 or greater
Symantec Web Security (SWS)
|
Ensure Latest Definition Updates Applied
Symantec Data Center Security:Server (SDCS:S)
|
Ensure Latest Definition Updates Applied
Symantec Endpoint Protection (SEP)
Symantec Endpoint Protection for Linux (SEP for Linux)
|
all platforms - Help -> About will reflect the MP5 release version which will be at least 12.1.7004.6500
Symantec Endpoint Protection for Mac (SEP for Mac)
|
Apply definitions dated June 28th, 2016 rev. 37 or later.
<https://support.symantec.com/en_US/article.TECH235207.html>
Symantec Protection Engine (SPE)
|
Support will provide notification regarding location, deployment and verification steps
<https://support.symantec.com/en_US/article.INFO3791.html>
Symantec Protection for SharePoint Servers (SPSS)
|
Support will provide notification regarding location, deployment and verification steps
<https://support.symantec.com/en_US/article.INFO3795.html>
Symantec Mail Security for Microsoft Exchange (SMSMSE)
|
Support will provide notification regarding location, deployment and verification steps
<https://support.symantec.com/en_US/article.INFO3794.html>
Symantec Mail Security for Domino (SMSDOM)
|
Support will provide notification regarding location, deployment and verification steps
<https://support.symantec.com/en_US/article.INFO3793.html>
CSAPI
|
Support will provide notification regarding location, deployment and verification steps
Symantec Message Gateway (SMG)
|
Current installed version should be 10.6.1-4
Symantec Message Gateway for Service Providers (SMG-SP)
|
Ensure installed version of updated binary files have the same checksum specified in the patch release notes
**NOTE:**If you require additional information on how to update your Symantec product, see <https://support.symantec.com/en_US/article.TECH125408.html>
Norton Family:
Product update is delivered via LiveUpdateTM. LiveUpdateTM runs automatically at regular intervals or users can run an interactive LiveUpdateTM.
To perform LiveUpdateTM interactively, users should:
-
Access LiveUpdateTM in the product
-
Run LiveUpdateTM until all available updates are downloaded and installed
The Help -> About Box in the product UI will show the version 22.7.0.x if the update has been successfully applied.
Best Practices
As part of normal best practices, Symantec strongly recommends the following:
-
Restrict access to administrative or management systems to authorized privileged users.
-
Restrict remote access, if required, to trusted/authorized systems only.
-
Run under the principle of least privilege where possible to limit the impact of potential exploit.
-
Keep all operating systems and applications current with vendor patches.
-
Follow a multi-layered approach to security. At a minimum, run both firewall and anti-malware applications to provide multiple points of detection and protection to both inbound and outbound threats.
-
Deploy network- and host-based intrusion detection systems to monitor network traffic for signs of anomalous or suspicious activity. This may aid in the detection of attacks or malicious activity related to the exploitation of latent vulnerabilities.
ACKNOWLEDGEMENTS
Symantec would like to thank Tavis Ormandy with Google’s Project Zero, for reporting these to us and working closely with us as we addressed the issues.
REVISION
7/15/2016
- Additional updates to affected products table for SEP SBE
6/29/2016
-
Protection signatures added to Symantec Response section
-
Changes to the affected products tables.
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