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CVE-2022-4291— Aswjsflt.dll in Avast Antivirus windows caused a crash of the Mozilla Firefox browser due to heap corruption

Quick assessment

Affected
NortonLifelock 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 Script Shield 组件版本 18.0.1473.0 及之前版本存在缓冲区错误漏洞，该漏洞源于加载 Avast DLL 库时发生堆损坏而导致 Mozilla Firefox 浏览器崩溃。

CVSS 7.7 · High EPSS 0.43% · P35
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I. Basic Information for CVE-2022-4291

Vulnerability Information
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Vulnerability Title
Aswjsflt.dll in Avast Antivirus windows caused a crash of the Mozilla Firefox browser due to heap corruption
Source: CVE Program / CVE List V5
Vulnerability Description
The aswjsflt.dll library from Avast Antivirus windows contained a potentially exploitable heap corruption vulnerability that could enable an attacker to bypass the sandbox of the application it was loaded into, if applicable. This issue was fixed in version 18.0.1478 of the Script Shield Component.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
内存缓冲区边界内操作的限制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Avast Antivirus 缓冲区错误漏洞
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 Script Shield 组件版本 18.0.1473.0 及之前版本存在缓冲区错误漏洞，该漏洞源于加载 Avast DLL 库时发生堆损坏而导致 Mozilla Firefox 浏览器崩溃。
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
NortonLifelock Avast Antivirus 0 ~ 18.0.1473.0 -

II. Public POCs for CVE-2022-4291

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III. Intelligence Information for CVE-2022-4291

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Vendor Advisories for CVE-2022-4291 (1)

IV. Related Vulnerabilities

Same product: Avast Antivirus
Same vendor: NortonLifelock
Same weakness: CWE-119

V. Comments for CVE-2022-4291

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