USN-1521-1: IcedTea-Web vulnerabilities

Ubuntu Security Notice USN-1521-1

31st July, 2012

icedtea-web vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 12.04 LTS
  • Ubuntu 11.10
  • Ubuntu 11.04
  • Ubuntu 10.04 LTS

Summary

The IcedTea-Web Java web browser plugin could be made to crash or possibly run programs as your login if it opened a specially crafted applet.

Software description

  • icedtea-web - A web browser plugin to execute Java applets

Details

Chamal De Silva discovered that the IcedTea-Web Java web browser
plugin could dereference an uninitialized pointer. A remote attacker
could use this to craft a malicious web page that could cause a
denial of service by crashing the web browser or possibly execute
arbitrary code. (CVE-2012-3422)

Steven Bergom and others discovered that the IcedTea-Web Java web
browser plugin assumed that all strings provided by browsers are NULL
terminated, which is not guaranteed by the NPAPI (Netscape Plugin
Application Programming Interface). A remote attacker could use this
to craft a malicious Java applet that could cause a denial of service
by crashing the web browser, expose sensitive information or possibly
execute arbitrary code. (CVE-2012-3423)

Update instructions

The problem can be corrected by updating your system to the following package version:

Ubuntu 12.04 LTS:
icedtea-7-plugin 1.2-2ubuntu1.1
icedtea-6-plugin 1.2-2ubuntu1.1
Ubuntu 11.10:
icedtea-6-plugin 1.2-2ubuntu0.11.10.2
Ubuntu 11.04:
icedtea-6-plugin 1.2-2ubuntu0.11.04.2
Ubuntu 10.04 LTS:
icedtea-6-plugin 1.2-2ubuntu0.10.04.2

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

After a standard system update you need to restart your web browser to make
all the necessary changes.

References

CVE-2012-3422, CVE-2012-3423