---
layout: page
title: Security
permalink: security/
---

Please report security issues to staff@irssi.org. Thanks!

<h2>Past issues overview</h2>
<table class="table">
    <thead>
	<tr class="text-nowrap">
	    <th colspan="2">Links</th>
	    <th>Exploitable</th>
	    <th colspan="3">Versions affected</th>
	    <th>Fixed</th>
	    <th>Credit</th>
	    <th colspan="2">Description</th>
	</tr>
    </thead>
{% assign advisories = site.data.security | concat: site.security %}{%
assign lttrs = 'abcdefghijklmn' | split: '' %}{%
for advisory in advisories reversed %}
    <tbody>
	<tr>
	    <th colspan="3">{% if advisory.link %}<a href="{{ advisory.link }}">{{ advisory.name }}</a>{% elsif advisory.name contains "-SA-" %}<a href="{{ site.baseurl }}/security/html/{{ advisory.name | slugify	 | replace: '-', '_' }}">{{ advisory.name }}</a>{% else %}{{ advisory.name }}{% endif %}</th>
	    <th colspan="3">{% if advisory.affected_note %}{{ advisory.affected_note }}{% endif %}</th>
	    <th>{% if advisory.git_commit %}<a href="https://github.com/irssi/{% if advisory.repo %}{{ advisory.repo }}{% else %}irssi{% endif %}/commit/{{ advisory.git_commit }}">{{ advisory.release_date }}</a>{% else %}{{ advisory.release_date }}{% endif %}</th>
	    <th colspan="3"></th>
	</tr>
    </tbody>
	<tbody>
	{% for bug in advisory.bugs %}
		<tr>
		    <td rowspan="3"></td>
		    <td rowspan="3" class="text-nowrap">
			{% if bug.name %}
			<div>{% if bug.link %}<a href="{{ bug.link }}">{{ bug.name }}</a>{% else %}{{ bug.name }}{% endif %}</div>
			{% endif %}
			{% if bug.cve %}
			<div><a href="https://cve.mitre.org/cgi-bin/cvename.cgi?name={{ bug.cve }}">{{ bug.cve }}</a></div>
			{% endif %}
			{% unless bug.cve %}{% unless bug.name %}{% unless bug.external_links
			    %}({{lttrs[forloop.index0]}}){%
			endunless %}{% endunless %}{% endunless %}
			{% for link in bug.external_links %}
			<div><a href="{{ link.url }}">{{ link.id }}</a></div>
			{% endfor %}
		    </td>
		    <td rowspan="3">{{ bug.exploitable_by }}</td>
		    {% if bug.affected_note_top %}<td class="has-next-row" colspan="4">{{ bug.affected_note_top }}</td>{% else %}
		    <td class="has-next-row">{% if bug.affected_versions.from %}{{ bug.affected_versions.from | join: "<br/>" }}{% else %}*{% endif %}</td>
		    <td class="has-next-row">{% if bug.affected_versions.to %}&ndash;{% endif %}</td>
		    <td class="has-next-row">{{ bug.affected_versions.to | join: "<br/>"}}</td>
		    <td class="has-next-row">
		      {% if bug.git_commit %}<a href="https://github.com/irssi/{% if bug.repo %}{{ bug.repo }}{% else %}irssi{% endif %}/commit/{{ bug.git_commit }}">{{ bug.fixed_version }}</a>{% else %}{{ bug.fixed_version | join: "<br/>" }}{% endif %}
		    </td>
		    {% endif %}
		    <td rowspan="3">{{ bug.credit }}</td>
		    <td rowspan="3">{{ bug.description }}</td>
		    <td rowspan="3"></td>
		</tr>
		<tr>
		    {% if bug.affected_note_top %}
		    <td class="has-next-row has-previous-row">{% if bug.affected_versions.from %}{{ bug.affected_versions.from }}{% else %}*{% endif %}</td>
		    <td class="has-next-row has-previous-row">{% if bug.affected_versions.to %}&ndash;{% endif %}</td>
		    <td class="has-next-row has-previous-row">{{ bug.affected_versions.to }}</td>
		    <td class="has-next-row has-previous-row">
		      {% if bug.git_commit %}<a href="https://github.com/irssi/{% if bug.repo %}{{ bug.repo }}{% else %}irssi{% endif %}/commit/{{ bug.git_commit }}">{{ bug.fixed_version }}</a>{% else %}{{ bug.fixed_version }}{% endif %}
		    </td>
		    {% else %}
		    <td class="has-previous-row" colspan="3" rowspan="2">{% if bug.affected_note_bottom %}{{ bug.affected_note_bottom }}{% endif %}</td>
		    <td class="has-previous-row" rowspan="2"></td>
		    {% endif %}
		</tr>
		<tr>
		    {% if bug.affected_note_top %}
		    <td class="has-previous-row" colspan="3">{% if bug.affected_note_bottom %}{{ bug.affected_note_bottom }}{% endif %}</td>
		    <td class="has-previous-row"></td>
		    {% endif %}
		</tr>
	{% endfor %}
	</tbody>
{% endfor %}
    </tbody>
</table>

<h2>Reference</h2>

<p>"Exploitable by" column:</p>

<ul>
    <li>
	<b>Server</b>: Triggered by malicious inputs sent by a server with complete control over the connection<br />
	Example: malformed raw IRC commands
    </li>
    <li>
	<b>Client</b>: Triggered by malicious inputs sent by remote clients with no privileges over the network<br />
	Example: malformed color codes inside a message
    </li>
    <li>
	<b>Local</b>: Exploitable by unprivileged system users with access to the same filesystem<br />
	Example: CVE-2016-7553 (buf.pl information disclosure)
    </li>
    <li>
	<b>Formats</b>: Exploitable through internal format codes used in themes and configs. These are not normally processed from the network but may be in combination with buggy scripts.<br />
	Example: CVE-2017-5356 (Crash on <code>%[</code>)
    </li>
</ul>