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

0.0
medium

Snyk CVSS

    Attack Complexity Low
    User Interaction Required

    Threat Intelligence

    EPSS 0.52% (77th percentile)
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NVD
6.3 medium
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Red Hat
4.3 medium

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  • Snyk ID SNYK-CENTOS7-EXPAT-1936988
  • published 26 Jul 2021
  • disclosed 19 Feb 2013
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Introduced: 19 Feb 2013

CVE-2013-0340 Open this link in a new tab
CWE-611 Open this link in a new tab

How to fix?

There is no fixed version for Centos:7 expat.

NVD Description

Note: Versions mentioned in the description apply only to the upstream expat package and not the expat package as distributed by Centos. See How to fix? for Centos:7 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.

References