DescriptionThe xmlParserHandlePEReference function in parser.c in libxml2 before 2.9.2, as used in Web Listener in Oracle HTTP Server in Oracle Fusion Middleware,, and and other products, loads external parameter entities regardless of whether entity substitution or validation is enabled, which allows remote attackers to cause a denial of service (resource consumption) via a crafted XML document.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-151-1, DSA-2978-2
NVD severitymedium (attack range: remote)
Debian Bugs747309

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
libxml2 (PTS)wheezy2.8.0+dfsg1-7+wheezy5fixed
wheezy (security)2.8.0+dfsg1-7+wheezy6fixed
jessie (security)2.9.1+dfsg1-5+deb8u2fixed
stretch, sid2.9.4+dfsg1-2fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs


The upstream patch we used in DSA-2978-1 and DLA-16-1 is only half of the fix. The other half is likely which is only in libxml 2.9 and newer. This was found out with the test case given in
First patches:

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