Fedora: FEDORA-2019-139fcda84d High: Expat Namespace Extraction DoS

This is expat, the C library for parsing XML, written by James Clark. Expat

is a stream oriented XML parser. This means that you register handlers with

the parser prior to starting the parse. These handlers are called when the

parser discovers the associated structures in the document being parsed. A

start tag is an example of the kind of structures for which you may

register handlers.

This update includes a fix for a security vulnerability, CVE-2018-20843: > Fix

extraction of namespace prefixes from XML names; XML names with multiple colons

could end up in the wrong namespace, and take a high amount of RAM and CPU

resources while processing, opening the door to use for denial-of-service

attacks For more information on the changes in 2.2.7, see the upstream release

notes at: https://github.com/libexpat/libexpat/blob/R_2_2_7/expat/Changes#L5

* Thu Jun 27 2019 Joe Orton - 2.2.7-1

- update to 2.2.7 (#1723724, #1722224)

* Thu Jan 31 2019 Fedora Release Engineering - 2.2.6-2

- Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild

[ 1 ] Bug #1723724 - CVE-2018-20843 expat: large number of colons in input makes parser consume high amount of resources, leading to DoS [fedora-all]

https://bugzilla.redhat.com/show_bug.cgi?id=1723724

[ 2 ] Bug #1722224 - expat-2.2.7 is available

https://bugzilla.redhat.com/show_bug.cgi?id=1722224

su -c 'dnf upgrade --advisory FEDORA-2019-139fcda84d' at the command

line. For more information, refer to the dnf documentation available at

https://dnf.readthedocs.io/en/latest/command_ref.html

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