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CVE-2022-20803— ClamAV Double-free Vulnerability in the OLE2 File Parser

Quick assessment

Affected
Cisco ClamAV
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.

ClamAV（Clam AntiVirus）是ClamAV团队的一套免费且开源的杀毒软件。该软件用于检测木马、病毒、恶意软件和其他恶意威胁。 ClamAV 0.104.0版本到0.104.2版本存在资源管理错误漏洞，该漏洞源于OLE2 文件解析器中的边界错误。远程攻击者可以将特制文件传递给应用程序，触发双重自由错误利用该漏洞在目标系统上执行任意代码。

CVSS 8.6 · High EPSS 1.06% · P63

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2022-20803

Vulnerability Information
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Vulnerability Title
ClamAV Double-free Vulnerability in the OLE2 File Parser
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the OLE2 file parser of Clam AntiVirus (ClamAV) versions 0.104.0 through 0.104.2 could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device.The vulnerability is due to incorrect use of the realloc function that may result in a double-free. An attacker could exploit this vulnerability by submitting a crafted OLE2 file to be scanned by ClamAV on the affected device. An exploit could allow the attacker to cause the ClamAV scanning process to crash, resulting in a denial of service condition.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
双重释放
Source: CVE Program / CVE List V5
Vulnerability Title
ClamAV 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ClamAV（Clam AntiVirus）是ClamAV团队的一套免费且开源的杀毒软件。该软件用于检测木马、病毒、恶意软件和其他恶意威胁。 ClamAV 0.104.0版本到0.104.2版本存在资源管理错误漏洞，该漏洞源于OLE2 文件解析器中的边界错误。远程攻击者可以将特制文件传递给应用程序，触发双重自由错误利用该漏洞在目标系统上执行任意代码。
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
Cisco ClamAV 0.104.0 -

II. Public POCs for CVE-2022-20803

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III. Intelligence Information for CVE-2022-20803

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Vendor Advisories for CVE-2022-20803 (1)

IV. Related Vulnerabilities

Same product: ClamAV
Same vendor: Cisco
Same weakness: CWE-415

V. Comments for CVE-2022-20803

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