Symantec Endpoint Protection up to 14.2 RU2 DLL injection

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.5	$0-$5k	0.00

Summaryinfo

A vulnerability described as critical has been identified in Symantec Endpoint Protection and Endpoint Protection Small Business Edition up to 14.2 RU2. The affected element is an unknown function of the component DLL Handler. Executing a manipulation can lead to injection. This vulnerability is registered as CVE-2020-5821. The attack needs to be launched locally. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in Symantec Endpoint Protection and Endpoint Protection Small Business Edition up to 14.2 RU2 (Anti-Malware Software) and classified as critical. This vulnerability affects an unknown code block of the component DLL Handler. The manipulation with an unknown input leads to a injection vulnerability. The CWE definition for the vulnerability is CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Symantec Endpoint Protection (SEP) and Symantec Endpoint Protection Small Business Edition (SEP SBE), prior to 14.2 RU2 MP1 and prior to 14.2.5569.2100 respectively, may be susceptible to a DLL injection vulnerability, which is a type of issue whereby an individual attempts to execute their own code in place of legitimate code as a means to perform an exploit.

The weakness was published 02/03/2020 as SYMSA1505 as confirmed security advisory (Website). The advisory is shared for download at support.symantec.com. This vulnerability was named CVE-2020-5821 since 01/06/2020. The attack needs to be approached locally. The requirement for exploitation is a single authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1055.

Upgrading to version 14.2 RU2 MP1 or 14.2.5569.2100 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

Similar entries are available at VDB-149979, VDB-149981, VDB-149982 and VDB-149983. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Anti-Malware Software

Vendor

Symantec

Name

Version

14.2 RU2

License

commercial

Website

Vendor: https://www.symantec.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.7

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

Vendor Base Score (Symantec): 7.8
Vendor Vector (Symantec): 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Injection
CWE: CWE-74 / CWE-707 / CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Endpoint Protection/Endpoint Protection Small Business Edition 14.2 RU2 MP1/14.2.5569.2100

Timelineinfo

01/06/2020 🔍
02/03/2020 +28 days 🔍
02/03/2020 +0 days 🔍
02/12/2020 +9 days 🔍
02/12/2020 +0 days 🔍

Sourcesinfo

Vendor: symantec.com

Advisory: SYMSA1505
Status: Confirmed

CVE: CVE-2020-5821 (🔍)
GCVE (CVE): GCVE-0-2020-5821
GCVE (VulDB): GCVE-100-149980
See also: 🔍

Entryinfo

Created: 02/12/2020 07:35
Updated: 02/12/2020 07:40
Changes: 02/12/2020 07:35 (54), 02/12/2020 07:40 (19)
Complete: 🔍
Cache ID: 216::103