VDB-138310 · CVE-2019-11230 · BID 109344

Avast Antivirus up to 19.3 AvastSvc.exe link following

CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k0.00

Summaryinfo

A vulnerability was found in Avast Antivirus up to 19.3 and classified as problematic. The impacted element is an unknown function of the file AvastSvc.exe. Executing a manipulation can lead to link following. This vulnerability is registered as CVE-2019-11230. The attack needs to be launched locally. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Avast Antivirus up to 19.3 (Anti-Malware Software). It has been declared as problematic. This vulnerability affects an unknown code of the file AvastSvc.exe. The manipulation with an unknown input leads to a link following vulnerability. The CWE definition for the vulnerability is CWE-59. The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In Avast Antivirus before 19.4, a local administrator can trick the product into renaming arbitrary files by replacing the Logs\Update.log file with a symlink. The next time the product attempts to write to the log file, the target of the symlink is renamed. This defect can be exploited to rename a critical product file (e.g., AvastSvc.exe), causing the product to fail to start on the next system restart.

The weakness was published 07/18/2019 (Website). The advisory is available at securityfocus.com. This vulnerability was named CVE-2019-11230 since 04/14/2019. Local access is required to approach this attack. A single authentication is needed for exploitation. Technical details are known, but there is no available exploit.

Upgrading to version 19.4 eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.9
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.4
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Link following
CWE: CWE-59
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Antivirus 19.4

Timelineinfo

04/14/2019 🔍
07/18/2019 +95 days 🔍
07/19/2019 +1 days 🔍
11/01/2023 +1566 days 🔍

Sourcesinfo

Advisory: securityfocus.com⛔
Status: Not defined

CVE: CVE-2019-11230 (🔍)
GCVE (CVE): GCVE-0-2019-11230
GCVE (VulDB): GCVE-100-138310
SecurityFocus: 109344

Entryinfo

Created: 07/19/2019 10:30
Updated: 11/01/2023 16:05
Changes: 07/19/2019 10:30 (56), 07/08/2020 14:44 (1), 11/01/2023 16:05 (4)
Complete: 🔍
Cache ID: 216::103

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