From b2eb73ccfe48a5f3cabfe3614ab068da445fd89d Mon Sep 17 00:00:00 2001
From: Brian May <brian@linuxpenguins.xyz>
Date: Mon, 18 Mar 2019 19:45:34 +1100
Subject: DLA-1716-1 advisory

---
 english/lts/security/2019/dla-1716.data | 10 +++++
 english/lts/security/2019/dla-1716.wml  | 65 +++++++++++++++++++++++++++++++++
 2 files changed, 75 insertions(+)
 create mode 100644 english/lts/security/2019/dla-1716.data
 create mode 100644 english/lts/security/2019/dla-1716.wml

diff --git a/english/lts/security/2019/dla-1716.data b/english/lts/security/2019/dla-1716.data
new file mode 100644
index 00000000000..b73622daadb
--- /dev/null
+++ b/english/lts/security/2019/dla-1716.data
@@ -0,0 +1,10 @@
+<define-tag pagetitle>DLA-1716-1 ikiwiki</define-tag>
+<define-tag report_date>2019-03-18</define-tag>
+<define-tag secrefs>CVE-2019-9187</define-tag>
+<define-tag packages>ikiwiki</define-tag>
+<define-tag isvulnerable>yes</define-tag>
+<define-tag fixed>yes</define-tag>
+<define-tag fixed-section>no</define-tag>
+
+#use wml::debian::security
+
diff --git a/english/lts/security/2019/dla-1716.wml b/english/lts/security/2019/dla-1716.wml
new file mode 100644
index 00000000000..13606bf1782
--- /dev/null
+++ b/english/lts/security/2019/dla-1716.wml
@@ -0,0 +1,65 @@
+<define-tag description>LTS security update</define-tag>
+<define-tag moreinfo>
+<p>The ikiwiki maintainers discovered that the aggregate plugin did not use
+LWPx::ParanoidAgent. On sites where the aggregate plugin is enabled, authorized
+wiki editors could tell ikiwiki to fetch potentially undesired URIs even if
+LWPx::ParanoidAgent was installed:</p>
+
+    <p>local files via file: URIs
+    other URI schemes that might be misused by attackers, such as gopher:
+    hosts that resolve to loopback IP addresses (127.x.x.x)
+    hosts that resolve to RFC 1918 IP addresses (192.168.x.x etc.)</p>
+
+<p>This could be used by an attacker to publish information that should not have
+been accessible, cause denial of service by requesting <q>tarpit</q> URIs that are
+slow to respond, or cause undesired side-effects if local web servers implement
+<q>unsafe</q> GET requests. (<a href="https://security-tracker.debian.org/tracker/CVE-2019-9187">CVE-2019-9187</a>)</p>
+
+<p>Additionally, if liblwpx-paranoidagent-perl is not installed, the
+blogspam, openid and pinger plugins would fall back to LWP, which is
+susceptible to similar attacks. This is unlikely to be a practical problem for
+the blogspam plugin because the URL it requests is under the control of the
+wiki administrator, but the openid plugin can request URLs controlled by
+unauthenticated remote users, and the pinger plugin can request URLs controlled
+by authorized wiki editors.</p>
+
+<p>This is addressed in ikiwiki 3.20190228 as follows, with the same fixes
+backported to Debian 9 in version 3.20170111.1:</p>
+
+<ul>
+
+<li>URI schemes other than http: and https: are not accepted, preventing access
+  to file:, gopher:, etc.</li>
+
+<li>If a proxy is configured in the ikiwiki setup file, it is used for all
+  outgoing http: and https: requests. In this case the proxy is responsible for
+  blocking any requests that are undesired, including loopback or RFC 1918
+  addresses.</li>
+
+<li>If a proxy is not configured, and liblwpx-paranoidagent-perl is installed, it
+  will be used. This prevents loopback and RFC 1918 IP addresses, and sets a
+  timeout to avoid denial of service via <q>tarpit</q> URIs.</li>
+
+<li>Otherwise, the ordinary LWP user-agent will be used. This allows requests to
+  loopback and RFC 1918 IP addresses, and has less robust timeout behaviour.
+  We are not treating this as a vulnerability: if this behaviour is not
+  acceptable for your site, please make sure to install LWPx::ParanoidAgent or
+  disable the affected plugins.</li>
+
+</ul>
+
+<p>For Debian 8 <q>Jessie</q>, this problem has been fixed in version
+3.20141016.4+deb8u1.</p>
+
+<p>We recommend that you upgrade your ikiwiki packages. In addition it is also
+recommended that you have liblwpx-paranoidagent-perl installed, which listed in
+the recommends field of ikiwiki.</p>
+
+<p>Further information about Debian LTS security advisories, how to apply
+these updates to your system and frequently asked questions can be
+found at: <a href="https://wiki.debian.org/LTS">https://wiki.debian.org/LTS</a></p>
+</define-tag>
+
+# do not modify the following line
+#include "$(ENGLISHDIR)/lts/security/2019/dla-1716.data"
+# $Id: $
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