The following three updates for Debian are available:

[DSA 2891-3] mediawiki regression update
[DSA 2894-1] openssh security update
[DSA 2895-1] prosody security update

[DSA 2891-3] mediawiki regression update

- -------------------------------------------------------------------------
Debian Security Advisory DSA-2891-3 security@debian.org
http://www.debian.org/security/ Thijs Kinkhorst
March 31, 2014 http://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : mediawiki, mediawiki-extensions
CVE ID : CVE-2013-2031 CVE-2013-4567 CVE-2013-4568 CVE-2013-4572
CVE-2013-6452 CVE-2013-6453 CVE-2013-6454 CVE-2013-6472
CVE-2014-1610 CVE-2014-2665
Debian Bug : 729629 706601 742857 742857

The Mediawiki update issued as DSA 2891-1 caused regressions. This
update fixes those problems. For reference the original advisory
text follows.

Several vulnerabilities were discovered in MediaWiki, a wiki engine.
The Common Vulnerabilities and Exposures project describers the followin
issues:

CVE-2013-2031

Cross-site scripting attack via valid UTF-7 encoded sequences
in a SVG file.

CVE-2013-4567 & CVE-2013-4568

Kevin Israel (Wikipedia user PleaseStand) reported two ways
to inject Javascript due to an incomplete blacklist in the
CSS sanitizer function.

CVE-2013-4572

MediaWiki and the CentralNotice extension were incorrectly setting
cache headers when a user was autocreated, causing the user's
session cookies to be cached, and returned to other users.

CVE-2013-6452

Chris from RationalWiki reported that SVG files could be
uploaded that include external stylesheets, which could lead to
XSS when an XSL was used to include JavaScript.

CVE-2013-6453

MediaWiki's SVG sanitization could be bypassed when the XML was
considered invalid.

CVE-2013-6454

MediaWiki's CSS sanitization did not filter -o-link attributes,
which could be used to execute JavaScript in Opera 12.

CVE-2013-6472

MediaWiki displayed some information about deleted pages in
the log API, enhanced RecentChanges, and user watchlists.

CVE-2014-1610

A remote code execution vulnerability existed if file upload
support for DjVu (natively handled) or PDF files (in
combination with the PdfHandler extension) was enabled.
Neither file type is enabled by default in MediaWiki.

CVE-2014-2665

Cross site request forgery in login form: an attacker could login
a victim as the attacker.

For the stable distribution (wheezy), these problems have been fixed in
version 1.19.15+dfsg-0+deb7u1 of the mediawiki package and 3.5~deb7u2
of the mediawiki-extensions package.

For the unstable distribution (sid), these problems have been fixed in
version 1:1.19.15+dfsg-1 of the mediawiki package and 3.5 of the
mediawiki-extensions package.

We recommend that you upgrade your mediawiki packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: http://www.debian.org/security/

[DSA 2894-1] openssh security update

- -------------------------------------------------------------------------
Debian Security Advisory DSA-2894-1 security@debian.org
http://www.debian.org/security/ Salvatore Bonaccorso
April 05, 2014 http://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : openssh
CVE ID : CVE-2014-2532 CVE-2014-2653
Debian Bug : 742513

Two vulnerabilities were discovered in OpenSSH, an implementation of the
SSH protocol suite. The Common Vulnerabilities and Exposures project
identifies the following problems:

CVE-2014-2532

Jann Horn discovered that OpenSSH incorrectly handled wildcards in
AcceptEnv lines. A remote attacker could use this issue to trick
OpenSSH into accepting any environment variable that contains the
characters before the wildcard character.

CVE-2014-2653

Matthew Vernon reported that if a SSH server offers a
HostCertificate that the ssh client doesn't accept, then the client
doesn't check the DNS for SSHFP records. As a consequence a
malicious server can disable SSHFP-checking by presenting a
certificate.

Note that a host verification prompt is still displayed before
connecting.

For the oldstable distribution (squeeze), these problems have been fixed in
version 1:5.5p1-6+squeeze5.

For the stable distribution (wheezy), these problems have been fixed in
version 1:6.0p1-4+deb7u1.

For the unstable distribution (sid), these problems have been fixed in
version 1:6.6p1-1.

We recommend that you upgrade your openssh packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: http://www.debian.org/security/

[DSA 2895-1] prosody security update

- -------------------------------------------------------------------------
Debian Security Advisory DSA-2895-1 security@debian.org
http://www.debian.org/security/ Luciano Bello
April 06, 2014 http://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : prosody

A denial-of-service vulnerability has been reported in Prosody, a XMPP
server. If compression is enabled, an attacker might send highly-com-
pressed XML elements (attack known as "zip bomb") over XMPP streams and
consume all the resources of the server.

The SAX XML parser lua-expat is also affected by this issues.

For the stable distribution (wheezy), this problem has been fixed in
version 0.8.2-4+deb7u1 of prosody.

For the unstable distribution (sid), this problem has been fixed in
version 0.9.4-1 of prosody.

For the stable distribution (wheezy), this problem has been fixed in
version 1.2.0-5+deb7u1 of lua-expat.

For the unstable distribution (sid), this problem has been fixed in
version 1.3.0-1 lua-expat.

We recommend that you upgrade your prosody and lua-expat packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: http://www.debian.org/security/