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AUSCERT External Security Bulletin Redistribution
ESB-2019.2370.2
SYMSA1485-Symantec Endpoint Encryption Privilege Escalation
6 August 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: Symantec Endpoint Encryption
Publisher: Symantec
Operating System: Windows
Mac OS
Impact/Access: Increased Privileges -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-9703 CVE-2019-9702
Original Bulletin:
http://support.symantec.com/content/unifiedweb/us/en/article.SYMSA1485.html
Revision History: August 6 2019: Vendor added alternative solutions
(Option 1 and 2)
July 1 2019: Initial Release
- --------------------------BEGIN INCLUDED TEXT--------------------
Symantec Endpoint Encryption Privilege Escalation
SYMSA1485
Last Updated August 05, 2019
Initial Publication Date June 17, 2019
o Status: Closed
o Severity: Medium
o CVSS Base Score: 6.5
Summary
Affected Products
+-------------------------------------------------------+
|Symantec Endpoint Encryption (SEE) |
+-------------+-------------------+---------------------+
|CVE |Affected Version(s)|Remediation |
+-------------+-------------------+---------------------+
|CVE-2019-9702| | |
| |Prior to SEE 11.3.0|Upgrade to SEE 11.3.0|
|CVE-2019-9703| | |
+-------------+-------------------+---------------------+
+-------------------------------------------------------+
|Symantec Encryption Desktop (SED) |
+-------------+-------------------+---------------------+
|CVE |Affected Version(s)|Remediation |
+-------------+-------------------+---------------------+
|CVE-2019-9702| |Migrate to SEE 11.3.0|
| |All versions | |
|CVE-2019-9703| |(See above) |
+-------------+-------------------+---------------------+
Issues
+-----------------------------------------------------------------------------+
|CVE-2019-9702 |
+------------+----------------------------------------------------------------+
|Severity/ |Medium / 6.5 AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:H |
|CVSSv3: | |
+------------+----------------------------------------------------------------+
|References: |Security Focus: BID 108795 / NVD: CVE-2019-9702 |
| | |
|Impact: |Privilege Escalation |
+------------+----------------------------------------------------------------+
| |Symantec Endpoint Encryption and Symantec Encryption Desktop may|
|Description:|be susceptible to a privilege escalation vulnerability, which is|
| |a type of issue that allows a user to gain elevated access to |
| |resources that are normally protected at lower access levels. |
+------------+----------------------------------------------------------------+
+-----------------------------------------------------------------------------+
|CVE-2019-9703 |
+------------+----------------------------------------------------------------+
|Severity/ |Medium / 6.5 AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:H |
|CVSSv3: | |
+------------+----------------------------------------------------------------+
|References: |Security Focus: BID 108796 / NVD: CVE-2019-9703 |
| | |
|Impact: |Privilege Escalation |
+------------+----------------------------------------------------------------+
| |Symantec Endpoint Encryption and Symantec Encryption Desktop may|
|Description:|be susceptible to a privilege escalation vulnerability, which is|
| |a type of issue that allows a user to gain elevated access to |
| |resources that are normally protected at lower access levels. |
+------------+----------------------------------------------------------------+
Mitigation
These issues were validated by the product team engineers. A Symantec Endpoint
Encryption update version SEE 11.3.0, has been released which addresses the
aforementioned issues. Note that SEE Bitlocker is not affected by this report.
The latest releases and patches for Symantec Endpoint Encryption are available
to customers through normal support channels. At this time, Symantec is not
aware of any exploitations or adverse customer impact from these issues.
Note for users of Symantec Encryption Desktop, the following two options exist
for install/upgrade scenarios for Symantec Encryption Desktop to avoid this
report completely:
Option 1: If Drive Encryption is not being used for Symantec Encryption
Desktop, but other components are still being used, a customized install can be
performed to disable the affected Drive Encryption driver with the following
install option:
msiexec /i SymantecEncryptionDesktop.msi PGP_INSTALL_WDE=0
This will not install the Drive Encryption component, but will install all
other encryption components such as File Share, PGPzip and Email Encryption.
(See article TECH249430 for more information on msiexec option)
Option 2 : If Symantec Endpoint Encryption 11.3 can be installed over the top
of Symantec Encryption Desktop for the Drive Encryption component the affected
SED driver will be replaced with the patched SEE 11.3 driver for Drive
Encryption. All other components such as File Share Encryption or Email
Encryption will remain installed even after SEE has been installed over SED to
replace the Drive Encryption component.
Be advised, If the above two options are not possible for Symantec Encryption
Desktop, Symantec still recommends the following measures to reduce risk of
attack:
o Restrict access to administrative or management systems to authorized
privileged users.
o Restrict remote access to trusted/authorized systems only.
o Run under the principle of least privilege, where possible, to limit the
impact of potential exploit.
o Keep all operating systems and applications current with vendor patches.
o 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 for both inbound and outbound threats.
o 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
o CVE-2019-9702: Kyriakos Economou (@kyREcon) of Nettitude: https://
www.nettitude.com/
o CVE-2019-9703: Kyriakos Economou (@kyREcon) of Nettitude: https://
www.nettitude.com/
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