Buffer overflow in icedtea-web - CVE-2012-3423

Detailed vulnerability description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

The IcedTea-Web plugin before 1.2.1 does not properly handle NPVariant NPStrings without NUL terminators, which allows remote attackers to cause a denial of service (crash), obtain sensitive information from memory, or execute arbitrary code via a crafted Java applet.

How to mitigate CVE-2012-3423

Sources

• http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=518
• http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=863
• http://icedtea.classpath.org/hg/release/icedtea-web-1.2/file/icedtea-web-1.2.1/NEWS
• http://icedtea.classpath.org/hg/release/icedtea-web-1.2/rev/d65bd94e0ba9
• http://icedtea.classpath.org/hg/release/icedtea-web-1.2/rev/d7375e2a9076
• http://lists.opensuse.org/opensuse-security-announce/2012-08/msg00003.html
• http://lists.opensuse.org/opensuse-security-announce/2012-08/msg00004.html
• http://lists.opensuse.org/opensuse-security-announce/2012-08/msg00005.html
• http://lists.opensuse.org/opensuse-security-announce/2013-05/msg00020.html
• http://lists.opensuse.org/opensuse-security-announce/2013-07/msg00013.html
• http://lists.opensuse.org/opensuse-updates/2013-05/msg00032.html
• http://lists.opensuse.org/opensuse-updates/2013-06/msg00030.html
• http://lists.opensuse.org/opensuse-updates/2013-06/msg00101.html
• http://rhn.redhat.com/errata/RHSA-2012-1132.html
• http://secunia.com/advisories/50089
• http://security.gentoo.org/glsa/glsa-201406-32.xml
• http://www.ubuntu.com/usn/USN-1521-1
• https://bugzilla.redhat.com/show_bug.cgi?id=841345