/ 
XML-LibXML-1.49 UNAUTHORIZED RELEASE
/ XML::LibXML::Dtd
Security Advisories (3)
CVE-2015-3451 (2015-04-23)

The _clone function does not properly set the expand_entities option, which allows remote attackers to conduct XML external entity (XXE) attacks via crafted XML data to the (1) new or (2) load_xml function.

CVE-2017-10672 (2015-04-23)

Use-after-free in the XML-LibXML module through 2.0129 for Perl allows remote attackers to execute arbitrary code by controlling the arguments to a replaceChild call.

CVE-2026-8177 (2026-05-10)

XML::LibXML versions through 2.0210 for Perl read out-of-bounds heap memory when parsing XML node names containing truncated UTF-8 byte sequences. A node name ending in the middle of a multi byte UTF-8 sequence causes the parser to read past the end of the input string into adjacent heap memory. Any Perl process that passes attacker controlled strings to XML::LibXML's DOM node-name methods can reach this path on the default API. The likely consequence is a crash, causing denial of service.

NAME

XML::LibXML::Dtd - A Class implementing Dtd Nodes

synopsis

use XML::LibXML

$dtd = XML::LibXML::Dtd->new($public_id, $system_id)
$dtd = XML::LibXML::Dtd->parse_string($dtd_str)

DESCRIPTION

This class holds a DTD. You may parse a DTD from either a string, or from an external SYSTEM identifier.

No support is available as yet for parsing from a filehandle.

XML::LibXML::Dtd is a sub-class of Node, so all the methods available to nodes (particularly toString()) are available to Dtd objects.

Methods

new

Parse a DTD from the system identifier, and return a DTD object that you can pass to $doc->is_valid() or $doc->validate().

my $dtd = XML::LibXML::Dtd->new(
                     "SOME // Public / ID / 1.0",
                     "test.dtd"
                               );
my $doc = XML::LibXML->new->parse_file("test.xml");
$doc->validate($dtd);
parse_string

The same as new() above, except you can parse a DTD from a string.

AUTHOR

Matt Sergeant, Christian Glahn

VERSION

1.49