AVG/Avast Antivirus up to 24.0 COM AVGUI.exe toctou

CVSS Meta Temp Score
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CTI Interest Score
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7.1$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in AVG/Avast Antivirus up to 24.0. Impacted is an unknown function of the file AVGUI.exe of the component COM Handler. Performing a manipulation results in toctou. This vulnerability is identified as CVE-2024-5803. The attack is only possible with local access. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in AVG/Avast Antivirus up to 24.0. It has been classified as critical. This affects some unknown functionality of the file AVGUI.exe of the component COM Handler. The manipulation with an unknown input leads to a toctou vulnerability. CWE is classifying the issue as CWE-367. The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The AVGUI.exe of AVG/Avast Antivirus before versions before 24.1 can allow a local attacker to escalate privileges via an COM hijack in a time-of-check to time-of-use (TOCTOU) when self protection is disabled.

The weakness was released by Cirosec Gmbh. The advisory is shared at support.norton.com. This vulnerability is uniquely identified as CVE-2024-5803 since 06/10/2024. The exploitability is told to be difficult. An attack has to be approached locally. Technical details are known, but no exploit is available.

Upgrading to version 24.1 eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.2
VulDB Meta Temp Score: 7.1

VulDB Base Score: 7.0
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (NLOK): 🔍

CVSSv2info

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

Exploitinginfo

Class: Toctou
CWE: CWE-367 / CWE-362
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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Antivirus 24.1

Timelineinfo

06/10/2024 🔍
10/03/2024 +115 days 🔍
10/03/2024 +0 days 🔍
10/04/2024 +1 days 🔍

Sourcesinfo

Advisory: support.norton.com
Researcher: Cirosec Gmbh
Status: Confirmed

CVE: CVE-2024-5803 (🔍)
GCVE (CVE): GCVE-0-2024-5803
GCVE (VulDB): GCVE-100-279141

Entryinfo

Created: 10/03/2024 16:57
Updated: 10/04/2024 11:19
Changes: 10/03/2024 16:57 (66), 10/04/2024 11:19 (1)
Complete: 🔍
Cache ID: 216::103

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