Resource Management Errors Affecting expat package, versions <2.1.1-3

Note: Versions mentioned in the description apply only to the upstream expat package and not the expat package as distributed by Debian. See How to fix? for Debian:9 relevant fixed versions and status.

The XML parser in Expat does not use sufficient entropy for hash initialization, which allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted identifiers in an XML document. NOTE: this vulnerability exists because of an incomplete fix for CVE-2012-0876.

• https://security-tracker.debian.org/tracker/CVE-2016-5300
• https://source.android.com/security/bulletin/2016-11-01.html
• https://www.tenable.com/security/tns-2016-20
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5300
• http://www.debian.org/security/2016/dsa-3597
• https://security.gentoo.org/glsa/201701-21
• https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b@%3Cissues.bookkeeper.apache.org%3E
• https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4@%3Cissues.bookkeeper.apache.org%3E
• http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
• http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
• http://www.openwall.com/lists/oss-security/2016/06/04/4
• http://www.openwall.com/lists/oss-security/2016/06/04/5
• http://www.securityfocus.com/bid/91159
• http://people.ubuntu.com/~ubuntu-security/cve/CVE-2016-5300
• http://www.ubuntu.com/usn/USN-3010-1
• https://kc.mcafee.com/corporate/index?page=content&id=SB10365
• https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
• https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E