Symantec Endpoint Protection DLL Library Path privileges management

CVSS Meta Temp Score
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CTI Interest Score
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7.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in Symantec Endpoint Protection. Impacted is an unknown function of the component DLL Library Handler. This manipulation causes privileges management (Path). This vulnerability appears as CVE-2016-5311. The attack requires local access. There is no available exploit. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability has been found in Symantec Endpoint Protection (Anti-Malware Software) (affected version unknown) and classified as critical. Affected by this vulnerability is an unknown functionality of the component DLL Library Handler. The manipulation with an unknown input leads to a privileges management vulnerability (Path). The CWE definition for the vulnerability is CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. As an impact it is known to affect confidentiality, integrity, and availability.

The bug was discovered 11/22/2016. The weakness was presented 11/17/2016 by Herman Groeneveld (sh4d0wman) as SYM16-021 as confirmed security advisory (Website). It is possible to read the advisory at symantec.com. The public release was coordinated in cooperation with Symantec. This vulnerability is known as CVE-2016-5311 since 06/06/2016. The exploitation appears to be easy. Attacking locally is a requirement. The successful exploitation needs a single authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK. The advisory points out:

Norton products and SEPSBE/SEPC clients are susceptible to a potential DLL-preloading issue resulting from improper path restrictions. This could cause one of the application libraries to explicitly load a third-party system DLL without specifying an absolute path. An authorized but malicious user with access to a client could potentially insert a specially crafted file using the same name as the specified DLL into one of the susceptible folders or a network share. In most situations, the arbitrary code would run with user-level privileges. However, during installation or uninstallation processes, arbitrary code could run with system privileges

The vulnerability scanner Nessus provides a plugin with the ID 96045 (Symantec Endpoint Protection Client < 22.8.0.50 Elevation of Privilege (SYM16-021)), 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.

Applying the patch NGC 22.8.0.50 is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability. The security advisory contains the following remark:

Product engineers have addressed this vulnerability through a client update delivered to Norton products and SEPSBE/SEPC clients via LiveUpdate along with normal definition and signature updates.

The vulnerability is also documented in the databases at Tenable (96045) and SecurityFocus (BID 94295†). See VDB-93704 for similar entry. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.6

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Name: Path
Class: Privileges management / Path
CWE: CWE-269 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 96045
Nessus Name: Symantec Endpoint Protection Client < 22.8.0.50 Elevation of Privilege (SYM16-021)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: NGC 22.8.0.50

Timelineinfo

06/06/2016 🔍
11/17/2016 +164 days 🔍
11/17/2016 +0 days 🔍
11/17/2016 +0 days 🔍
11/20/2016 +3 days 🔍
11/22/2016 +2 days 🔍
12/21/2016 +29 days 🔍
10/04/2022 +2113 days 🔍

Sourcesinfo

Vendor: symantec.com

Advisory: SYM16-021
Researcher: Herman Groeneveld (sh4d0wman)
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2016-5311 (🔍)
GCVE (CVE): GCVE-0-2016-5311
GCVE (VulDB): GCVE-100-93703
SecurityFocus: 94295 - Multiple Symantec Products CVE-2016-5311 DLL Loading Local Privilege Escalation Vulnerability
SecurityTracker: 1037323

See also: 🔍

Entryinfo

Created: 11/20/2016 11:20
Updated: 10/04/2022 09:56
Changes: 11/20/2016 11:20 (59), 07/07/2019 18:32 (6), 10/04/2022 09:54 (2), 10/04/2022 09:56 (17)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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