The gcc packages include C, C++, Java, Fortran 77, Objective C, and Ada 95 GNU compilers and related support libraries.
Jürgen Weigert discovered a directory traversal flaw in fastjar. An attacker could create a malicious JAR file which, if unpacked using fastjar, could write to any files the victim had write access to. (CVE-2006-3619)
These updated packages also fix several bugs, including:
two debug information generator bugs
two internal compiler errors
In addition to this, protoize.1 and unprotoize.1 manual pages have been added to the package and __cxa_get_exception_ptr@@CXXABI_1.3.1 symbol has been added into libstdc++.so.6.
For full details regarding all fixed bugs, refer to the package changelog as well as the specified list of bug reports from bugzilla.
All users of gcc should upgrade to these updated packages, which contain backported patches to resolve these issues.