The XPInstall installer in Mozilla Firefox before the Preview Release, Mozilla before 1.7.3, and Thunderbird before 0.8 sets insecure permissions for certain installed files within xpi packages, which could allow local users to overwrite arbitrary files or execute arbitrary code.

Updated mozilla packages that fix various bugs are now available.

This update has been rated as having critical security impact by the Red Hat Security Response Team.

Mozilla is an open source Web browser, advanced email and newsgroup client, IRC chat client, and HTML editor.

A buffer overflow bug was found in the way Mozilla processes GIF images. It is possible for an attacker to create a specially crafted GIF image, which when viewed by a victim will execute arbitrary code as the victim. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2005-0399 to this issue.

A bug was found in the way Mozilla displays dialog windows. It is possible that a malicious web page which is being displayed in a background tab could present the user with a dialog window appearing to come from the active page. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2004-1380 to this issue.

A bug was found in the way Mozilla allowed plug-ins to load privileged content into a frame. It is possible that a malicious webpage could trick a user into clicking in certain places to modify configuration settings or execute arbitrary code. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2005-0232 to this issue.

A bug was found in the way Mozilla Mail handles cookies when loading content over HTTP regardless of the user's preference. It is possible that a particular user could be tracked through the use of malicious mail messages which load content over HTTP. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2005-0149 to this issue.

A bug was found in the way Mozilla responds to proxy auth requests. It is possible for a malicious webserver to steal credentials from a victims browser by issuing a 407 proxy authentication request. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2005-0147 to this issue.

A bug was found in the way Mozilla handles certain start tags followed by a NULL character. A malicious web page could cause Mozilla to crash when viewed by a victim. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2004-1613 to this issue.

A bug was found in the way Mozilla sets file permissions when installing XPI packages. It is possible for an XPI package to install some files world readable or writable, allowing a malicious local user to steal information or execute arbitrary code. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2004-0906 to this issue.

A bug was found in the way Mozilla loads links in a new tab which are middle clicked. A malicious web page could read local files or modify privileged chrom settings. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2005-0141 to this issue.

A bug was found in the way Mozilla displays the secure site icon. A malicious web page can use a view-source URL targetted at a secure page, while loading an insecure page, yet the secure site icon shows the previous secure state. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2005-0144 to this issue.

Users of Mozilla are advised to upgrade to this updated package which contains Mozilla version 1.4.4 and additional backported patches to correct these issues.

A number of vulnerabilities were fixed in mozilla 1.7.3, the following of which have been backported to mozilla packages for Mandrakelinux 10.0 :

  - 'Send page' heap overrun

    - JavaScript clipboard access

    - buffer overflow when displaying VCard

    - BMP integer overflow

    - javascript: link dragging

    - Malicious POP3 server III

The details of all of these vulnerabilities are available from the Mozilla website.

The remote host is using Mozilla and/or Firefox, an alternative web browser.

The version of this software is prone to an improper file permission setting. This flaw only exists if the browser is installed by the Mozilla Foundation package management, therefore, this alert might be a false positive.

A local attacker could overwrite arbitrary files or execute arbitrary code in the context of the user running the browser.

The remote host is affected by the vulnerability described in GLSA-200409-26 (Mozilla, Firefox, Thunderbird, Epiphany: New releases fix vulnerabilities)

    Mozilla-based products are vulnerable to multiple security issues.
    Firstly, routines handling the display of BMP images and VCards contain     an integer overflow and a stack buffer overrun. Specific pages with     long links, when sent using the 'Send Page' function, and links with     non-ASCII hostnames could both cause heap buffer overruns.
    Several issues were found and fixed in JavaScript rights handling:
    untrusted script code could read and write to the clipboard, signed     scripts could build confusing grant privileges dialog boxes, and when     dragged onto trusted frames or windows, JavaScript links could access     information and rights of the target frame or window. Finally,     Mozilla-based mail clients (Mozilla and Mozilla Thunderbird) are     vulnerable to a heap overflow caused by invalid POP3 mail server     responses.
  Impact :

    An attacker might be able to run arbitrary code with the rights of the     user running the software by enticing the user to perform one of the     following actions: view a specially crafted BMP image or VCard, use the     'Send Page' function on a malicious page, follow links with malicious     hostnames, drag multiple JavaScript links in a row to another window,     or connect to an untrusted POP3 mail server. An attacker could also use     a malicious page with JavaScript to disclose clipboard contents or     abuse previously-given privileges to request XPI installation     privileges through a confusing dialog.
  Workaround :

    There is no known workaround covering all vulnerabilities.

The remote host is using Mozilla and/or Firefox, a web browser.

The remote version of this software is vulnerable to several flaws that could allow an attacker to execute arbitrary code on the remote host, get access to content of the user clipboard or, perform a cross-domain cross-site scripting attack.

A remote attacker could exploit these issues by tricking a user into viewing a malicious web page.

The remote host seems to be running Mozilla or Firefox for Linux. It is reported that versions up to and include 0.9.3 of Firefox and up to and including 1.7.2 of Mozilla are prone to an improper file permission issue in the installation process. Upon installation, several files are created with world-writable permissions. An attacker with interactive access to the host may corrupt these scripts and programs during the installation process. This vulnerability exists only in the Linux archive version. If you installed Firefox using your Linux distribution packaging system, the vulnerability is likely not present on the remote system. 

ID	Name	Product	Family	Severity
17624	RHEL 2.1 / 3 : mozilla (RHSA-2005:323)	Nessus	Red Hat Local Security Checks	high
15521	Mandrake Linux Security Advisory : mozilla (MDKSA-2004:107)	Nessus	Mandriva Local Security Checks	critical
15432	Mozilla Multiple Products XPInstall Arbitrary File Overwrite	Nessus	Windows	high
14781	GLSA-200409-26 : Mozilla, Firefox, Thunderbird, Epiphany: New releases fix vulnerabilities	Nessus	Gentoo Local Security Checks	critical
14728	Mozilla Browsers Multiple Vulnerabilities	Nessus	Windows	high
2281	Mozilla/Firefox Linux Installation Arbitrary File Overwrite (deprecated)	Nessus Network Monitor	Web Clients	medium

Detections

Analytics

CVE-2004-0906

high

Tenable Plugins

high

critical

high

critical

high

medium