CVE-2020-5227

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.

How to fix CVE-2020-5227

To remediate CVE-2020-5227, upgrade the affected package to a fixed version below.

• —upgrade to 0.9.0 or later
• —upgrade to f57a01b20fa4aaaeccfa417f28e66b4084b9d0cf or later

Is CVE-2020-5227 being exploited?

Low — EPSS is 0.7%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

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

CVSS scores

References (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