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CVE-2021-44686

Quick assessment

Affected
n/a n/a
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.

Calibre是印度科维德·戈亚尔（Kovid Goyal）个人开发者的一个开源免费的全能电子书阅读管理与格式转换工具。 calibre 5.32.0 之前存在安全漏洞，该漏洞源于在 ebooks/conversion/preprocess.py 的 html_preprocess_rules 中包含容易受到 ReDoS（正则表达式拒绝服务）攻击的正则表达式。

AI Predicted 5.3 Difficulty: Moderate EPSS 4.99% · P92

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-44686

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
calibre before 5.32.0 contains a regular expression that is vulnerable to ReDoS (Regular Expression Denial of Service) in html_preprocess_rules in ebooks/conversion/preprocess.py.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
calibre 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Calibre是印度科维德·戈亚尔（Kovid Goyal）个人开发者的一个开源免费的全能电子书阅读管理与格式转换工具。 calibre 5.32.0 之前存在安全漏洞，该漏洞源于在 ebooks/conversion/preprocess.py 的 html_preprocess_rules 中包含容易受到 ReDoS（正则表达式拒绝服务）攻击的正则表达式。
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
- n/a n/a -

II. Public POCs for CVE-2021-44686

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III. Intelligence Information for CVE-2021-44686

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Mailing List Discussions for CVE-2021-44686 (1)

Other References for CVE-2021-44686 (3)

Same Patch Batch · n/a · 2021-12-06 · 29 CVEs total

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CVE-2021-44679 9.8 CRITICAL Veritas Enterprise Vault 代码问题漏洞
CVE-2021-44680 9.8 CRITICAL Veritas Enterprise Vault 代码问题漏洞
CVE-2021-44681 9.8 CRITICAL Veritas Enterprise Vault代码问题漏洞
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CVE-2021-44685 Git 操作系统命令注入漏洞
CVE-2021-44684 Github-Todos 操作系统命令注入漏洞
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CVE-2021-43033 Unitrends Backup 操作系统命令注入漏洞
CVE-2021-43471 Canon LBP223 安全漏洞
CVE-2021-43469 VENGA 路由器 命令注入漏洞
CVE-2021-43044 Unitrends Backup 信任管理问题漏洞
CVE-2021-43043 Unitrends Backup 安全漏洞
CVE-2021-43042 Unitrends Backup 安全漏洞

Showing top 20 of 29 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

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Same vendor: n/a

V. Comments for CVE-2021-44686

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