CVE-2020-5227

描述

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.

如何修補 CVE-2020-5227

要修補 CVE-2020-5227,請將受影響套件升級到下列已修補版本。

• —升級至 0.9.0 或更新版本
• —升級至 f57a01b20fa4aaaeccfa417f28e66b4084b9d0cf 或更新版本

CVE-2020-5227 正在被利用嗎?

低 — EPSS 為 0.7%,目前沒有觀察到大規模利用活動。

受影響套件(2)

• from 0, < 0.9.0
• from 0, < f57a01b20fa4aaaeccfa417f28e66b4084b9d0cf | from 0, < 0.9.0

CVSS 分數

參考連結(8)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2020-5227
• PATCHgithub.com/lkiesow/python-feedgen
• WEBdocs.microsoft.com/en-us/archive/msdn-magazine/2009/november/xml-denial-of-service-attacks-and-defenses
• WEBgithub.com/lkiesow/python-feedgen/commit/f57a01b20fa4aaaeccfa417f28e66b4084b9d0cf