Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion') Affecting libxml2 package, versions <2.9.10+dfsg-6.7


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.08% (37th percentile)

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  • Snyk IDSNYK-DEBIAN12-LIBXML2-1551269
  • published16 May 2021
  • disclosed9 Jul 2021

Introduced: 16 May 2021

CVE-2021-3541  (opens in a new tab)
CWE-776  (opens in a new tab)

How to fix?

Upgrade Debian:12 libxml2 to version 2.9.10+dfsg-6.7 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libxml2 package and not the libxml2 package as distributed by Debian. See How to fix? for Debian:12 relevant fixed versions and status.

A flaw was found in libxml2. Exponential entity expansion attack its possible bypassing all existing protection mechanisms and leading to denial of service.

CVSS Scores

version 3.1