Symantec is aware of a local access Symantec Endpoint Protection (SEP) client buffer overflow exploit that has been released publicly which could potentially cause a BSOD on the client or possibly allow unauthorized local privilege elevation on Symantec Endpoint Protection (SEP) clients.
Product
|
Version
|
Build
|
Solution(s)
—|—|—|—
Symantec Endpoint Protection Client
|
12.1
|
All
|
Update to 12.1 RU4 MP1b. Follow recommended mitigation until update is installed
Symantec Endpoint Protection Client
|
11.0
|
All
|
Update to 12.1 RU4 MP1b. Follow recommended mitigation until update is installed
Symantec Endpoint Protection 12.0 Small Business Edition
|
12.0
|
All
|
update to latest available build of SEP 12.1 Small Business Edition
Product Not Affected
Product
|
Version
—|—
Symantec Endpoint Protection Manager
|
All
Symantec Endpoint Protection 12.1 Small Business Edition
|
All
Symantec Endpoint Protection.cloud (SEP SBE)
|
All
Symantec Network Access Control (SNAC)
|
All
CVSS2
Base Score
|
Impact
|
Exploitability
|
CVSS2 Vector
—|—|—|—
SEP Local Client ADC Buffer Overflow- Medium
6.9
|
10.0
|
3.4
|
AV:L/AC:M/AU:N/C:C/I:C/A:C
CVE
|
BID
|
Description
—|—|—
CVE-2014-3434
|
BID 68946
|
SEP Local Client ADC Buffer Overflow
Details
The sysplant driver, loaded as part of the Application and Device Control (ADC) component on a SEP client, does not do sufficient validation of external input which could result in a local client BSOD denial of service or, if successfully exploited, potentially local elevation of privilege on the client system.
Symantec Response
Symantec product engineers verified this issue and have created an update to resolve it. Customers should use the mitigation described below until the available update can be installed to address this issue. Symantec is not aware of exploitation of or adverse customer impact from this issue.
Update Information
Please see TECH223338 for further information on language and build availability for Symantec Endpoint Protection update 12.1 RU4 MP1b.
Mitigations
If unable to apply the update immediately, SEP administrators can uninstall or disable ADC in SEP 12.1 or SEP 11.0 by following the instructions provided in KB Article, TECH223338
Symantec Security Response has released Bloodhound.Exploit.554 for this type of issue. This detection is available through normal Symantec security updates.
Best Practices
As part of normal best practices, Symantec strongly recommends the following:
Symantec would like to thank CERT/CC for reporting this issue from Offensive Security to Symantec and coordinating with us. Symantec further thanks Matteo Memelli, Offensive Security for providing coordination to confirm the issues were addressed.
BID: Security Focus, http://www.securityfocus.com, has assigned Bugtraq IDs (BIDs) to these issues for inclusion in the Security Focus vulnerability database.
CVE: These issues are candidates for inclusion in the CVE list (http://cve.mitre.org), which standardizes names for security problems.