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CVE-2024-5803— Local privelage escalation via COM hijacking

Quick assessment

Affected
AVG/Avast Antivirus
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Avast Antivirus是捷克Avast公司的一套杀毒软件。 Avast Antivirus 24.1之前版本存在安全漏洞，该漏洞源于当自我保护被禁用时，通过COM劫持在检查时间到使用时间的过程中，可能允许本地攻击者提升权限。

CVSS 7.5 · High EPSS 0.11% · P1
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I. Basic Information for CVE-2024-5803

Vulnerability Information
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Vulnerability Title
Local privelage escalation via COM hijacking
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
Source: CVE Program / CVE List V5
Vulnerability Title
Avast Antivirus 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Avast Antivirus是捷克Avast公司的一套杀毒软件。 Avast Antivirus 24.1之前版本存在安全漏洞，该漏洞源于当自我保护被禁用时，通过COM劫持在检查时间到使用时间的过程中，可能允许本地攻击者提升权限。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
AVG/Avast Antivirus <24.1 -

II. Public POCs for CVE-2024-5803

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III. Intelligence Information for CVE-2024-5803

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Vendor Advisories for CVE-2024-5803 (1)

IV. Related Vulnerabilities

Same product: Antivirus
Same vendor: AVG/Avast
Same weakness: CWE-367

V. Comments for CVE-2024-5803

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