WordPress 3.5.1, Denial of Service
--Apple-Mail=_B3B19972-2CCC-459B-B083-2372157C5D86
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain;
charset=us-ascii
Version 3.5.1 (latest) of popular blogging engine WordPress suffers from =
remote denial of service vulnerability. The bug exists in encryption =
module (class-phpass.php). The exploitation of this vulnerability is =
possible only when at least one post is protected by a password.
Time frames:
31.05.2013 WordPress security team has been informed about the =
vulnerability (no response).
07.06.2013 The vulnerability has been released to the public.
More information (including proof of concept):
https://vndh.net/note:wordpress-351-denial-service
A way out (before official WordPress update) to secure existing =
installations is to apply the following patch:
--- wp-includes/class-phpass.php
+++ wp-includes/class-phpass.php
@@ -120,7 +120,7 @@
return $output;
=20
$count_log2 =3D strpos($this->itoa64, $setting[3]);
- if ($count_log2 < 7 || $count_log2 > 30)
+ if ($count_log2 < 7 || $count_log2 > 13)
return $output;
=20
$count =3D 1 << $count_log2;=
--Apple-Mail=_B3B19972-2CCC-459B-B083-2372157C5D86
Content-Transfer-Encoding: 7bit
Content-Disposition: attachment;
filename=signature.asc
Content-Type: application/pgp-signature;
name=signature.asc
Content-Description: Message signed with OpenPGP using GPGMail
-----BEGIN PGP SIGNATURE-----
Version: GnuPG/MacGPG2 v2.0.19 (Darwin)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=jSm+
-----END PGP SIGNATURE-----
--Apple-Mail=_B3B19972-2CCC-459B-B083-2372157C5D86--
討論串 (同標題文章)
完整討論串 (本文為第 3 之 4 篇)：