Debian DSA-2322-1 : bugzilla - several vulnerabilities

This script is Copyright (C) 2011-2013 Tenable Network Security, Inc.


Synopsis :

The remote Debian host is missing a security-related update.

Description :

Several vulnerabilities were discovered in Bugzilla, a web-based bug
tracking system.

- CVE-2010-4572
By inserting particular strings into certain URLs, it
was possible to inject both headers and content to any
browser.

- CVE-2010-4567, CVE-2011-0048
Bugzilla has a 'URL' field that can contain several
types of URL, including 'javascript:' and 'data:' URLs.
However, it does not make 'javascript:' and 'data:' URLs
into clickable links, to protect against cross-site
scripting attacks or other attacks. It was possible to
bypass this protection by adding spaces into the URL in
places that Bugzilla did not expect them. Also,
'javascript:' and'data:' links were always shown as
clickable to logged-out users.

- CVE-2010-4568
It was possible for a user to gain unauthorized access
to any Bugzilla account in a very short amount of time
(short enough that the attack is highly effective).

- CVE-2011-0046
Various pages were vulnerable to Cross-Site Request
Forgery attacks. Most of these issues are not as serious
as previous CSRF vulnerabilities.

- CVE-2011-2978
When a user changes his email address, Bugzilla trusts a
user-modifiable field for obtaining the current e-mail
address to send a confirmation message to. If an
attacker has access to the session of another user (for
example, if that user left their browser window open in
a public place), the attacker could alter this field to
cause the email-change notification to go to their own
address. This means that the user would not be notified
that his account had its email address changed by the
attacker.

- CVE-2011-2381
For flagmails only, attachment descriptions with a
newline in them could lead to the injection of crafted
headers in email notifications when an attachment flag
is edited.

- CVE-2011-2379
Bugzilla uses an alternate host for attachments when
viewing them in raw format to prevent cross-site
scripting attacks. This alternate host is now also used
when viewing patches in 'Raw Unified' mode because
Internet Explorer 8 and older, and Safari before 5.0.6
do content sniffing, which could lead to the execution
of malicious code.

- CVE-2011-2380, CVE-2011-2979
Normally, a group name is confidential and is only
visible to members of the group, and to non-members if
the group is used in bugs. By crafting the URL when
creating or editing a bug, it was possible to guess if a
group existed or not, even for groups which weren't used
in bugs and so which were supposed to remain
confidential.

See also :

http://security-tracker.debian.org/tracker/CVE-2010-4572
http://security-tracker.debian.org/tracker/CVE-2010-4567
http://security-tracker.debian.org/tracker/CVE-2011-0048
http://security-tracker.debian.org/tracker/CVE-2010-4568
http://security-tracker.debian.org/tracker/CVE-2011-0046
http://security-tracker.debian.org/tracker/CVE-2011-2978
http://security-tracker.debian.org/tracker/CVE-2011-2381
http://security-tracker.debian.org/tracker/CVE-2011-2379
http://security-tracker.debian.org/tracker/CVE-2011-2380
http://security-tracker.debian.org/tracker/CVE-2011-2979
http://www.debian.org/security/2011/dsa-2322

Solution :

Upgrade the bugzilla packages.

For the oldstable distribution (lenny), it has not been practical to
backport patches to fix these bugs. Users of bugzilla on lenny are
strongly advised to upgrade to the version in the squeeze
distribution.

For the stable distribution (squeeze), these problems have been fixed
in version 3.6.2.0-4.4.

Risk factor :

High / CVSS Base Score : 7.5
(CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P)
CVSS Temporal Score : 6.2
(CVSS2#E:F/RL:OF/RC:C)
Public Exploit Available : true