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CVE-2020-5227— Feedgen Vulnerable to XML Denial of Service Attacks

Quick assessment

Affected
lkiesow python-feedgen
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.

Feedgen 0.9.0之前版本中存在安全漏洞。攻击者可利用该漏洞造成拒绝服务。

CVSS 4.4 · Medium EPSS 2.18% · P81

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2020-5227

Vulnerability Information
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Vulnerability Title
Feedgen Vulnerable to XML Denial of Service Attacks
Source: CVE Program / CVE List V5
Vulnerability Description
Feedgen (python feedgen) before 0.9.0 is susceptible to XML Denial of Service attacks. The *feedgen* library allows supplying XML as content for some of the available fields. This XML will be parsed and integrated into the existing XML tree. During this process, feedgen is vulnerable to XML Denial of Service Attacks (e.g. XML Bomb). This becomes a concern in particular if feedgen is used to include content from untrused sources and if XML (including XHTML) is directly included instead of providing plain tex content only. This problem has been fixed in feedgen 0.9.0 which disallows XML entity expansion and external resources.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
DTD中递归实体索引的不恰当限制(XML实体扩展)
Source: CVE Program / CVE List V5
Vulnerability Title
Feedgen 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Feedgen 0.9.0之前版本中存在安全漏洞。攻击者可利用该漏洞造成拒绝服务。
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
lkiesow python-feedgen < 0.9.0 -

II. Public POCs for CVE-2020-5227

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III. Intelligence Information for CVE-2020-5227

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Patches & Fixes for CVE-2020-5227 (1)

Vendor Advisories for CVE-2020-5227 (2)

Mailing List Discussions for CVE-2020-5227 (1)

IV. Related Vulnerabilities

Same weakness: CWE-776

V. Comments for CVE-2020-5227

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