Jan Lieskovsky discovered an error in expat, an XML parsing C library, when parsing certain UTF-8 sequences, which can be exploited to crash an application using the library. For the old stable distribution , this problem has been fixed in version 1.95.8-3.4+etch2. For the stable distribution , this problem has been fixed in version 2.0.1-4+lenny2. For the testing distribution and the unstable distribution , this problem will be in version 2.0.1-6. The builds for the mipsel architecture for the old stable distribution are not included yet. They will be released when they become available. We recommend that you upgrade your expat packages.