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CVE-2022-20770— ClamAV CHM File Parsing Denial of Service Vulnerability Affecting Cisco Products: April 2022

Quick assessment

Affected
Cisco Cisco AMP for Endpoints
Exploitation
High exploitation probability; assess promptly
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 0.103版本到0.103.5版本存在资源管理错误漏洞，该漏洞源于CHM 文件解析器中的无限循环。远程攻击者可以消耗所有可用的系统资源利用该漏洞实现拒绝服务攻击。

CVSS 8.6 · High EPSS 7.07% · P94

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2022-20770

Vulnerability Information
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Vulnerability Title
ClamAV CHM File Parsing Denial of Service Vulnerability Affecting Cisco Products: April 2022
Source: CVE Program / CVE List V5
Vulnerability Description
On April 20, 2022, the following vulnerability in the ClamAV scanning library versions 0.103.5 and earlier and 0.104.2 and earlier was disclosed: A vulnerability in CHM file parser of Clam AntiVirus (ClamAV) versions 0.104.0 through 0.104.2 and LTS version 0.103.5 and prior versions could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device. For a description of this vulnerability, see the ClamAV blog. This advisory will be updated as additional information becomes available.
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
资源管理错误
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 0.103版本到0.103.5版本存在资源管理错误漏洞，该漏洞源于CHM 文件解析器中的无限循环。远程攻击者可以消耗所有可用的系统资源利用该漏洞实现拒绝服务攻击。
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 Cisco AMP for Endpoints n/a -

II. Public POCs for CVE-2022-20770

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III. Intelligence Information for CVE-2022-20770

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Vendor Advisories for CVE-2022-20770 (2)

Mailing List Discussions for CVE-2022-20770 (4)

Same Patch Batch · Cisco · 2022-05-04 · 13 CVEs total

CVE-2022-20777 9.9 CRITICAL Cisco Enterprise NFV Infrastructure Software Vulnerabilities
CVE-2022-20779 9.9 CRITICAL Cisco Enterprise NFV Infrastructure Software Vulnerabilities
CVE-2022-20780 9.9 CRITICAL Cisco Enterprise NFV Infrastructure Software Vulnerabilities
CVE-2022-20771 7.5 HIGH ClamAV TIFF File Parsing Denial of Service Vulnerability Affecting Cisco Products: April 2
CVE-2022-20785 7.5 HIGH ClamAV HTML Scanning Memory Leak Vulnerability Affecting Cisco Products: April 2022
CVE-2022-20764 6.5 MEDIUM Cisco TelePresence Collaboration Endpoint and RoomOS Software Vulnerabilities
CVE-2022-20794 6.5 MEDIUM Cisco TelePresence Collaboration Endpoint and RoomOS Software Vulnerabilities
CVE-2022-20796 6.5 MEDIUM ClamAV Truncated File Denial of Service Vulnerability Affecting Cisco Products: April 2022
CVE-2022-20753 4.7 MEDIUM Cisco Small Business RV Series Routers Remote Code Execution Vulnerability
CVE-2022-20801 4.7 MEDIUM Cisco Small Business RV Series Routers Command Injection Vulnerabilities
CVE-2022-20799 4.7 MEDIUM Cisco Small Business RV Series Routers Command Injection Vulnerabilities
CVE-2022-20734 4.4 MEDIUM Cisco SD-WAN vManage Software Information Disclosure Vulnerability

IV. Related Vulnerabilities

Same product: Cisco AMP for Endpoints
Same vendor: Cisco
Same weakness: CWE-399

V. Comments for CVE-2022-20770

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