oss-security - Security issue in gitweb

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Date: Fri, 03 Jun 2011 11:15:12 -0500
From: Jamie Strandboge <jamie@...onical.com>
To: akub Narebski <jnareb@...il.com>, Junio C Hamano <gitster@...ox.com>
Cc: oss-security@...ts.openwall.com, dave b <db.pub.mail@...il.com>
Subject: Security issue in gitweb

A security bug was reported by 'dave b' (in CC) against gitweb in
Ubuntu. You are being emailed as the upstream contact. Please keep
oss-security[1] CC'd for any updates on this issue.

This issue should be considered public, but has not yet been assigned a
CVE. Once a CVE is assigned, please mention it in any changelogs.

Details from the public bug follow:
https://launchpad.net/bugs/777804

From the reporter:
----
I am reporting a persistent xss vector in gitweb, note this requires a
user to have commit access to a repository that gitweb is configured
to display. The vector is the fact that gitweb "serves" up xml files -
which can (just as gitweb does) embed html that could be used to
perform a cross-site scripting attack.

e.g. (lol.xml).
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US"
lang="en-US">
<head>
</head>
<script>alert(1);</script>
</html>

and viewed at
http://$HOSTNAME/$PATH_TO_GITWEB/?p=lolok;a=blob_plain;f=lol.xml
----

Thanks in advance for your cooperation in coordinating a fix for this
issue,

Jamie Strandboge

[1] oss-security@...ts.openwall.com is a public mailing list for
    people to collaborate on security vulnerabilities and coordinate
    security updates.

-- 
Jamie Strandboge             | http://www.canonical.com

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