XML External Entity (XXE) Injection Affecting expat package, versions *


low

Snyk CVSS

    Attack Complexity Low
    User Interaction Required
NVD
CVSS v3 N/A  medium
Red Hat
CVSS v3 N/A  medium

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  • Snyk ID SNYK-DEBIAN11-EXPAT-524217
  • published 21 Jan 2014
  • disclosed 21 Jan 2014

How to fix?

There is no fixed version for Debian:11 expat.

NVD Description

Note: Versions mentioned in the description apply only to the upstream expat package and not the expat package as distributed by Debian:11. See How to fix? for Debian:11 relevant fixed versions and status.

expat 2.1.0 and earlier does not properly handle entities expansion unless an application developer uses the XML_SetEntityDeclHandler function, which allows remote attackers to cause a denial of service (resource consumption), send HTTP requests to intranet servers, or read arbitrary files via a crafted XML document, aka an XML External Entity (XXE) issue. NOTE: it could be argued that because expat already provides the ability to disable external entity expansion, the responsibility for resolving this issue lies with application developers; according to this argument, this entry should be REJECTed, and each affected application would need its own CVE.