Ubuntu 4.10 / 5.04 : mozilla, mozilla-firefox vulnerabilities (USN-186-1)
High Nessus Plugin ID 20597
SynopsisThe remote Ubuntu host is missing one or more security-related patches.
DescriptionPeter 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.
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)
This could be exploited to run arbitrary code under some conditions.
This update also fixes some less critical issues which are described at http://www.mozilla.org/security/announce/mfsa2005-58.html.
Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
SolutionUpdate the affected packages.