Debian: DSA-3898-1 Critical: Expat DoS Issues and Fixes

CVE-2016-9063

Gustavo Grieco discovered an integer overflow flaw during parsing of
XML. An attacker can take advantage of this flaw to cause a denial
of service against an application using the Expat library.

CVE-2017-9233

Rhodri James discovered an infinite loop vulnerability within the
entityValueInitProcessor() function while parsing malformed XML
in an external entity. An attacker can take advantage of this
flaw to cause a denial of service against an application using
the Expat library.

For the oldstable distribution (jessie), these problems have been fixed
in version 2.1.0-6+deb8u4.

For the stable distribution (stretch), these problems have been fixed in
version 2.2.0-2+deb9u1. For the stable distribution (stretch),
CVE-2016-9063 was already fixed before the initial release.

For the testing distribution (buster), these problems have been fixed
in version 2.2.1-1 or earlier version.

For the unstable distribution (sid), these problems have been fixed in
version 2.2...