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=========================================================== Ubuntu Security Notice USN-186-1 September 23, 2005 mozilla, mozilla-firefox vulnerabilities CAN-2005-2701, CAN-2005-2702, CAN-2005-2703, CAN-2005-2704, CAN-2005-2705, CAN-2005-2706, CAN-2005-2707, CAN-2005-2968 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 4.10 (Warty Warthog) Ubuntu 5.04 (Hoary Hedgehog) The following packages are affected: mozilla-browser mozilla-calendar mozilla-mailnews mozilla-firefox On Ubuntu 4.10, the problem can be corrected by upgrading the affected package to version 2:1.7.12-0ubuntu04.10 (mozilla-browser, mozilla-calendar, mozilla-mailnews). On Ubuntu 5.04, the problem can be corrected by upgrading the affected package to version 2:1.7.12-0ubuntu05.04 (mozilla-browser, mozilla-calendar, mozilla-mailnews) and 1.0.7-0ubuntu0.1 (mozilla-firefox). After a standard system upgrade you need to restart all Firefox and Mozilla browsers to effect the necessary changes. Note: The Ubuntu 4.10 version of Firefox is also affected by this. An update will follow shortly. Details follow: Peter Zelezny discovered that URLs which are passed to Firefox or Mozilla on the command line are not correctly protected against interpretation by the shell. If Firefox or Mozilla is configured as the default handler for URLs (which is the default in Ubuntu), this could be exploited to execute arbitrary code with user privileges by tricking the user into clicking on a specially crafted URL (for example, in an email or chat client). (CAN-2005-2968, MFSA-2005-59) A buffer overflow was discovered in the XBM image handler. By tricking an user into opening a specially crafted XBM image, an attacker could exploit this to execute arbitrary code with the user's privileges. (MFSA-2005-58) Mats Palmgren discovered a buffer overflow in the Unicode string parser. Unicode strings that contained "zero-width non-joiner" characters caused a browser crash, which could possibly even exploited to execute arbitrary code with the user's privileges. (MFSA-2005-58) Georgi Guninski reported an integer overflow in the JavaScript engine. This could be exploited to run arbitrary code under some conditions. (MFSA-2005-58) This update also fixes some less critical issues which are described at http://www.mozilla.org/security/announce/mfsa2005-58.html.